Every tool, in one place.

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302 tools that run in your browser, grouped by what they help you do. Filter by name, or open a category.

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Calculators

EMI CalculatorMonthly instalment, total interest and a yearly schedule for any loan.

Salary & CTC CalculatorCTC to take-home pay with tax, PF and employer cost, every figure traced to the rule and source behind it.

FD CalculatorFixed deposit maturity and interest, with the compounding your bank uses.

Date Difference CalculatorDays, weeks, months and weekdays between two dates, with or without the end date.

SIP CalculatorWhat a monthly mutual fund investment could grow to over time.

RD CalculatorWhat a monthly recurring deposit grows to, compounded quarterly like banks and post offices.

Smart Split — Shared Expenses and GroupsGroups, friends and shared expenses kept on your account: six ways to split, exact balances, the fewest payments to settle, and reports. · Needs internet

Retirement PlannerHow much you need to retire, what your EPF, PPF, NPS and SIPs grow to, and the extra SIP that closes the gap.

Compound Interest CalculatorCompound and simple interest side by side, compounded yearly to daily.

Loan Eligibility CalculatorHow much home or personal loan your income can support, from the EMI limit banks use.

Loan Prepayment CalculatorSee how much interest a part-prepayment saves — finishing sooner or lowering the EMI — once or every year.

Age CalculatorExact age in years, months and days, and the countdown to your next birthday.

CAGR CalculatorCompound annual growth rate between a start and end value, with the total change.

Date Calculator — Add Days or Working DaysAdd or subtract days, weeks, months or working days from a date, skipping weekends and India’s public holidays.

Tip & Bill Split CalculatorAdd a tip and split the bill evenly, with optional rounding up.

BMI CalculatorBody mass index from height and weight, with WHO or Asian-Indian cut-offs and the healthy weight for your height.

Loan Comparison CalculatorCompare two loan offers side by side — EMI, interest, fees with GST and the effective rate — and see which costs less.

Percentage CalculatorFind a percentage of a number, what percent one number is of another, or percent change.

Calorie CalculatorCalories a day to keep, lose or gain weight: your TDEE from BMR and activity, with steady weekly targets.

BMR CalculatorBasal metabolic rate by Mifflin-St Jeor, revised Harris-Benedict and, with a body-fat figure, Katch-McArdle.

Ideal Weight CalculatorIdeal body weight for your height by the Devine, Robinson, Miller and Hamwi formulas, beside the healthy BMI range.

Scientific CalculatorA scientific calculator you can type into: trigonometry in degrees or radians, logs, powers, roots, factorials, brackets and a history of answers.

Average CalculatorMean, median, mode, range and standard deviation of a list of numbers, plus a weighted average — exact, for up to 50,000 numbers.

Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers exactly, simplify them, and turn decimals into fractions.

Running Pace CalculatorPace per kilometre or mile and speed from a distance and a time, with predicted 5K to marathon times.

Ratio CalculatorSimplify a ratio, find the missing term of a proportion, or share an amount in a ratio so the parts add up exactly.

Prime Number CheckerCheck whether a number of up to 100 digits is prime, find its prime factors, its divisors and the primes on either side of it.

GCD and LCM CalculatorGreatest common divisor and least common multiple of up to twenty whole numbers of any size, with Euclid’s steps and prime factors.

Factorial CalculatorExact factorials up to 10,000! with every digit, digits and trailing zeros up to a billion!, and permutations and combinations (nPr, nCr).

India Tools

8 tools

Income Tax CalculatorYour income tax for 2026-27 under the new and old regimes, side by side, with every slab shown.

GST CalculatorAdd GST to a price or take it out, with the CGST, SGST and IGST split.

PPF CalculatorPublic Provident Fund maturity, deposits and interest at the current notified rate.

EPF CalculatorProvident fund balance at retirement from your basic pay, with the new ₹25,000 wage ceiling.

HRA Exemption CalculatorHow much house rent allowance is tax-free for 2026-27, with the eight 50% cities.

NPS CalculatorNational Pension System corpus, lump sum and pension under the 2025 exit rules.

Gratuity CalculatorGratuity from last drawn basic pay and years of service, under the Code on Social Security.

GSTIN ValidatorCheck a GSTIN offline — state code, PAN, holder type and check character — one at a time or a whole list.

Developer Tools

58 tools

JSON FormatterFormat, validate and minify JSON or JSONC, browse it as a tree, and catch duplicate keys and lost precision.

JSON StudioA JSON workbench: edit with syntax checks, fix broken JSON safely, see it as a 3D graph, cards, tree or table, diff it, validate a schema, query with jq, and convert to CSV, XML, YAML or SQL.

Password GeneratorStrong random passwords and memorable passphrases, made on your device with cryptographic randomness.

Diagram StudioFlowcharts, sequence, ER, class, Gantt and 15 more Mermaid diagrams, drawn as you type. SQL → ER, OpenAPI or JSON → class diagram, SVG, PNG and PDF. On your device.

JWT DecoderDecode a JSON Web Token, verify its signature with a secret, PEM or JWK Set, and make signed test tokens — in your browser, never uploaded.

SQL PlaygroundRun real SQLite in your browser: write a query against a sample shop or your own tables, and see every result set, the schema and the query plan.

Unix Timestamp ConverterUnix time to a readable date and back, in seconds, milliseconds or nanoseconds, in any time zone.

Text Diff CheckerCompare two texts side by side or unified, with changed words highlighted and a patch git can apply.

Regex TesterTest a JavaScript regular expression live: highlighted matches, groups, flags and replace.

Base64 Encoder & DecoderEncode text or files to Base64 or a data: URI, and decode it back — text, or the file inside with its type and a preview.

JSON DiffCompare two JSON documents by structure and see every change at its path — key order and spacing ignored.

Markdown PreviewA Markdown workspace: editor and live preview side by side, tabs and folders, maths, Mermaid diagrams, exports. Saved in your browser; nothing is uploaded.

SQL FormatterBeautify SQL for PostgreSQL, MySQL, SQL Server, Oracle, BigQuery and more — strings and comments untouched.

cURL ConverterTurn a curl command into JavaScript fetch, axios or Python requests — headers, body, auth and forms included.

JSON ↔ CSV ConverterTurn a JSON array into a spreadsheet-ready CSV, or CSV into JSON, without losing columns.

CSS Formatter and MinifierBeautify or minify CSS, including nesting and custom properties, with unclosed blocks and strings pinpointed. Values are never rewritten.

CSV WorkbenchOpen a CSV of any size: profile every column, sort, filter, find duplicates, check for broken rows, split it, or convert it to JSON or SQL — on your device.

Hash GeneratorMD5, SHA-1, SHA-256 and SHA-512 of text or a file, HMAC, and a checksum match check.

HTTP Status CodesEvery HTTP status code with what it means, when to send it and the RFC section that defines it — searchable by number or words.

JSON to TypesTurn a JSON sample into types for TypeScript, Zod, C#, Java, Kotlin, Go, Python, Rust, Swift, Dart, PHP or JavaScript, with optional and nullable fields worked out.

Colour Converter and Contrast CheckerConvert colours between HEX, RGB, HSL and OKLCH, check WCAG contrast, and get the nearest colour that passes.

YAML ↔ JSON ConverterConvert YAML to JSON and back, with anchors, merge keys and several documents handled.

IP Subnet Calculator (IPv4 and IPv6)Network, broadcast, usable host range, netmask and wildcard for any IPv4 or IPv6 block — exact counts, address types, splitting and an in-range check.

JSONPath TesterQuery JSON with standard RFC 9535 JSONPath — filters, slices and functions — and see every match with its path.

Regex VisualizerDraw any JavaScript regular expression as a railroad diagram, read it in plain English, and try it on your own text.

URL Encoder & DecoderPercent-encode or decode text for URLs, and break a URL into its parts and query parameters.

UUID GeneratorGenerate UUID v4, time-ordered v7, ULID and name-based v5 in bulk, and decode any ID’s version and creation time.

XML Formatter and ValidatorFormat, minify and check XML for well-formedness, with the exact line and column of any error. Text and mixed content are never changed.

JSON Schema ValidatorCheck JSON against a JSON Schema (draft-04 to 2020-12) and see each problem at its path, with the rule it broke.

Number Base ConverterBinary, octal, decimal, hex and any base to 36 — exact for huge numbers, with two’s complement and IEEE 754 floats.

.gitignore GeneratorBuild a .gitignore from GitHub’s official templates, then test whether any path would be ignored.

Mock Data GeneratorMake up to 10,000 rows of realistic test data — names, emails, numbers, dates — as JSON, CSV, SQL inserts or NDJSON, repeatable from a seed.

Chmod Calculator (Unix Permissions)Convert Unix file permissions between octal (755), ls -l (rwxr-xr-x) and chmod’s u=rwx form, with setuid, setgid and sticky bits and a plain-English meaning.

CORS CheckerFind out why a browser blocks a cross-origin request: whether it needs a preflight, which header the preflight or response is missing, and which headers your JavaScript can read — step by step, by the Fetch standard.

Cron Expression ExplainerTurn a cron schedule into plain English and see its next run times.

HTTP Request BuilderBuild an HTTP request — method, URL, query, headers, auth and body — and copy it as cURL, fetch, axios, Python, HTTPie or a .http file. Nothing is sent.

JSON PatchApply or make a JSON Patch (RFC 6902) or merge patch (RFC 7396), and read JSON Pointers — every failed operation named.

JSON Schema GeneratorTurn one or more JSON examples into a draft 2020-12 JSON Schema: types, required keys and formats inferred only where every example agrees.

Log ViewerOpen a log file of any size: filter by level, time and text, fold stack traces, group repeated errors and follow trace IDs.

OpenAPI Viewer and ValidatorRead an OpenAPI 3.0 or 3.1 description as API documentation and check it against the official schemas, with broken references and path parameters found too.

JMESPath TesterTest JMESPath queries — the language of the AWS CLI’s --query — on your JSON, checked against the official compliance suite.

HAR ViewerOpen a browser HAR file: a waterfall of every request, failures and slow calls, headers and bodies, copy as cURL — and a copy with cookies and tokens removed, safe to share.

HTML Entity Encoder & DecoderEscape text for HTML or decode &,  , ₹ and every other entity back to characters.

HTTP Headers AnalyzerPaste a response’s headers and see what they protect and what they leave open: HSTS, CSP, framing, cookies, caching, CORS and what the server gives away — graded and explained.

Query String ↔ JSONTurn a URL’s query string into JSON and JSON into a query string — browser or PHP/Rails/qs bracket rules, chosen by you.

String Escape and UnescapeEscape text for a JSON or JavaScript string, a SQL literal, a shell argument, a CSV cell or a regular expression — and read escaped text back, exactly as each format defines it.

JSON Schema DiffCompare two JSON Schemas and see which changes accept less, which accept more, and which need a person to check.

OpenAPI Diff — Breaking ChangesCompare two versions of an OpenAPI description and see which changes break existing clients, which to check, and which are safe — with a report for the pull request.

Webhook Signature CheckerPaste a webhook’s headers and body to see the provider and event and check its signature with your secret — GitHub, Stripe, Razorpay, Slack, Shopify, Standard Webhooks, GitLab or any HMAC. The secret stays on this page.

Colour Palette GeneratorNewBuild complementary, analogous, triadic and other palettes, plus a 50–950 tint and shade scale, from one colour in OKLCH, with contrast shown and CSS variables to copy.

CSP EvaluatorCheck a Content Security Policy the way browsers read it: which directive governs each kind of resource, and what lets injected script run — unsafe-inline, wildcards, missing object-src and base-uri, bad syntax.

CSS Gradient GeneratorNewDesign linear, radial and conic CSS gradients with up to eight colour stops and OKLCH blending, see them live, and copy the CSS with a fallback colour.

CSS Box Shadow GeneratorNewBuild CSS box shadows from up to five layers — offset, blur, spread, colour, opacity and inset — with a live preview and copyable CSS.

SVG Viewer and CleanerNewView an SVG safely, strip scripts, event handlers and outside links, tidy away editor clutter, and copy it as a file, a data URI or a CSS background.

CSS Animation Generator (Keyframes)NewMake a CSS animation — fade, slide, zoom, bounce, pulse, shake, spin or flip — with duration, delay, easing and repeats, and a reduced-motion rule built in.

CSS Button GeneratorNewDesign a CSS button — colours, padding, corners, border, type, shadow and hover — with hover, focus and disabled states, and the text contrast checked against WCAG.

CSS Border Radius GeneratorNewRound each corner separately, in pixels or percent, with elliptical corners for blob shapes, and copy the shortest border-radius shorthand.

Glassmorphism CSS GeneratorNewMake a frosted-glass panel with backdrop-filter: tint, opacity, blur, saturation, border and shadow, previewed over a colourful background, with copyable CSS.

Everyday Utilities

29 tools

QR Code GeneratorMake QR codes for links, Wi-Fi, WhatsApp, contacts, events, locations, phone, email and text, with an optional logo. Download PNG or SVG.

Unit ConverterLength, weight, temperature, area, volume, speed, data, pressure, energy, power, angle, fuel economy and more — exact conversions.

Time Zone Converter and Meeting PlannerConvert a time between cities — IST to London, New York and more — and find the hours everyone is at work.

Case ConverterUPPER, lower, Title and Sentence case, plus camelCase, snake_case and kebab-case for code.

UPI QR Code GeneratorNewMake a UPI payment QR code for your UPI ID, with or without a fixed amount, that any UPI app can scan. Checked by reading it back before download.

Word CounterCount words, characters, sentences and reading time — correct for Hindi — plus SMS parts, bytes and most-used words.

Length ConverterNewConvert between centimetres, inches, feet, metres, kilometres, miles and more using the exact international definitions, with every unit at once.

QR Code and Barcode ScannerNewScan a QR code or barcode with your camera, or read one from a photo or screenshot. See exactly what it holds before opening anything.

Temperature ConverterNewConvert Celsius, Fahrenheit and Kelvin exactly, with the formulas shown and absolute zero enforced: body temperature, cooking, weather and science.

Weight ConverterNewConvert kilograms, grams, pounds, ounces, stones, tonnes, quintals and tolas using the exact international definitions, with every unit at once.

Area ConverterNewConvert square feet, square metres, acres, hectares, gaj (square yards), guntha and cents, plus square inches to square kilometres, exactly.

Remove Duplicate LinesRemove repeated lines from a list and keep the order, with a count of what repeated and how often.

Lorem Ipsum GeneratorPlaceholder text by paragraphs, sentences or an exact number of words, as plain text or HTML.

Barcode GeneratorNewMake Code 128, EAN-13, UPC-A, EAN-8, Code 39, ITF-14 and Interleaved 2 of 5 barcodes, with check digits added and checked. PNG or SVG.

Sort LinesSort a list A to Z, Z to A, naturally (2 before 10) or by length, and drop duplicates or blank lines.

Text CleanerFix text pasted from PDFs and web pages: extra spaces, blank lines, broken lines and invisible characters.

Data Size Converter (MB, GB, GiB)NewConvert bits, bytes, KB, MB, GB, TB and PB, and the binary KiB, MiB, GiB and TiB that operating systems report, plus Mbit to MB for internet speeds.

Slug GeneratorTurn titles into clean URL slugs: accents removed, symbols spelt out, cut at a word to fit a length.

Volume ConverterNewConvert litres, millilitres, US and UK gallons, pints, quarts, cups, fluid ounces, spoons, cubic feet and cubic metres, exactly.

Speed ConverterNewConvert km/h, mph, metres per second, knots, feet per second and metres per minute exactly, with every unit shown at once.

Reverse TextReverse text backwards, word order or line order, with emoji, accents and Indian scripts kept whole.

Power Converter (kW, hp, BTU/h)NewConvert watts, kilowatts, horsepower (hp and PS), BTU per hour, AC tons of refrigeration and kcal per hour, using exact definitions.

Energy Converter (kcal, kJ, kWh)NewConvert kilocalories, kilojoules, joules, kilowatt-hours (units), megajoules, BTU, foot-pounds and electronvolts, using exact definitions.

Frequency Converter (Hz, MHz, GHz, rpm)NewConvert hertz, kilohertz, megahertz, gigahertz and terahertz, and revolutions or beats per minute, for radios, Wi-Fi, processors, motors and heart rate.

Fuel Economy Converter (km/L, L/100 km, mpg)NewConvert fuel economy between km per litre, litres per 100 km and US or UK miles per gallon — compare a car’s mileage figures from any country.

Pressure Converter (psi, bar, kgf/cm²)NewConvert psi, bar, kgf/cm², kPa, MPa, atmospheres, mmHg, inHg and torr, for tyres, gauges, weather and blood pressure, with exact definitions.

Time Converter (Hours, Minutes, Days)NewConvert seconds, minutes, hours, days, weeks, months and years, down to milliseconds and nanoseconds, with the length of a month and a year stated.

Angle Converter (Degrees, Radians)NewConvert degrees, radians, gradians, turns, arcminutes, arcseconds and milliradians, with π handled to 20 digits rather than 3.14.

Barcode Check Digit Calculator (EAN, UPC, ISBN)NewWork out or verify the check digit of an EAN-13, UPC-A, EAN-8, GTIN-14 or SSCC, with the sum shown, and convert ISBN-10 to ISBN-13 and back.

PDF & Documents

32 tools

Merge PDFCombine PDF files into one, in the order you choose; pages are copied as they are, so text stays selectable.

Compress PDFNewMake a PDF smaller, or under a size limit such as 200 KB: re-save its photos with the text left as text, or turn scans into compact pictures — size shown before and after.

Split PDFSplit a PDF into several files by page ranges, every few pages, by file size, in half or page by page, downloaded as one ZIP.

JPG to PDFNewTurn JPG, PNG and other images into one PDF — A4, Letter or the image size, with or without a margin, in the order you choose. JPEGs keep their full quality.

PDF to JPGNewSave PDF pages as JPG or PNG images at 72 to 300 dpi — every page or the ones you choose — in one ZIP, drawn in your browser.

PDF WorkspaceAdd PDFs once, then merge, split, reorder, rotate, extract, delete, crop, number and watermark pages in one place, with undo, and download a checked file.

OCR PDFNewRead the text in scanned PDFs and photos — English, Hindi and 18 more languages — and get a searchable PDF or a text file, in your browser.

Edit PDFAdd text, images, comments, rectangles, lines, arrows, highlights and freehand drawing to PDF pages, move and resize them, and download a checked file.

Sign PDFDraw or type your signature and place it on a PDF page, add the date, and download the signed copy. A visual signature, made in your browser.

Extract Images from PDFNewSave every picture in a PDF at its full quality — photos as the original JPEGs, nothing re-compressed — and the files attached to it, in one ZIP.

Fill PDF FormNewFill in a PDF form — text boxes, tick boxes, choices — and download it still fillable, or locked so the answers cannot change.

Rotate PDFTurn PDF pages left, right or upside down — one page, a selection or the whole file — without any loss of quality.

Text to PDFNewType, paste or open a text file and make a PDF of it: A4 or Letter, font, size and margins, Hindi and other Indian scripts too — checked and ready to download.

Unlock PDFNewRemove the password from a PDF you can open: type it once, download a copy that opens without it. Also lifts printing and copying restrictions.

Add Page Numbers to PDFNumber the pages of a PDF — position, style, size and the page to start on — see them on the pages, then download a checked file.

Compare PDFNewFind what changed between two PDFs: every word removed or added, with its page, and the pages that look different — a changed picture or signature included.

Create Fillable PDF FormNewMake any PDF fillable: put text fields, checkboxes, dropdowns, radio buttons and signature boxes over its blanks, name them, and download a form anyone can fill in a PDF reader.

Delete PDF PagesRemove pages from a PDF by clicking them or typing their numbers, undo if needed, and download the shorter file.

Organise PDF PagesReorder PDF pages by dragging or with the keyboard, duplicate them, and add blank pages or pages from another PDF.

Protect PDFNewPut a password on a PDF with AES-256 encryption, and choose whether it can be printed, copied or changed. Checked before you download it.

Extract PDF PagesSave chosen pages of a PDF as a new PDF, or each page as its own file, picked by clicking or by page numbers.

Repair PDFNewOpen a damaged PDF and get its readable pages back in a sound new file — and see what any PDF holds and what is wrong with it: fonts, pictures, scripts, signatures.

Watermark PDFPut a text watermark such as CONFIDENTIAL or DRAFT, or a logo image, across every page of a PDF — direction, colour or size, strength — and download a checked file.

Add Header and Footer to PDFNewPut a header and a footer on every page of a PDF — a title, a name, "Page 3 of 10" or a Bates number — see them on the pages, then download a checked file.

Crop PDFTrim the margins of PDF pages — all of them or the ones you choose — by millimetres from each edge, with the cut shown before you download.

Redact PDFNewBlack out names, numbers and anything else in a PDF for good: find words, emails, phone, PAN and card numbers, or draw boxes. What is under them is removed.

PDF Comments — View, Reply, RemoveNewSee every comment, highlight and note in a PDF with its author and date, reply to them, or remove some or all — then download a checked file.

PDF to TextNewGet the text out of a PDF as a plain .txt file, page by page, and see which pages are scans with no text in them.

Digitally Sign PDFNewSign a PDF with your own certificate (.p12 or .pfx): a digital signature any PDF reader checks, made in your browser with a key that never leaves it.

PDF Metadata EditorNewSee what a PDF says about itself — title, author, the app that made it, dates — and change it, or remove it all before you share the file.

PDF to MarkdownNewTurn a PDF into Markdown: headings, paragraphs and lists read from the text’s size, weight and place, as a .md file.

Verify PDF SignatureNewCheck the digital signatures in a PDF: whether the file changed after signing, who signed and when, and the certificate they used.

Image Tools

13 tools

Compress ImageNewMake a photo smaller — under a size you choose, such as 50 or 100 KB, or at a quality you set. JPEG, PNG and WebP, one picture or many.

Resize ImageNewChange a picture’s size in pixels — by width, height, longest side, exact box or percentage — keeping its shape. One or many at once.

Image Converter (JPG, PNG, WebP)NewConvert pictures between JPEG, PNG and WebP — and TIFF, GIF or BMP to any of them, or HEIC and AVIF where your browser opens them.

Crop ImageNewCut a picture to the part you want: drag a frame or type it in pixels, free or in a shape such as square, 4:3 or 16:9.

Passport Photo MakerNewMake a 35 × 45 mm or 2 × 2 inch passport or visa photo from any picture, at 300 dpi, with an optional sheet of copies to print.

Remove Background from a PhotoNewCut a person out of a photo: the background made transparent, a plain colour such as white, or blurred — by a model that runs in your browser.

Rotate and Flip ImageNewTurn a picture a quarter at a time, mirror it, or flip it upside down, and save it standing the right way.

Photo Details Viewer and Remover (EXIF)NewSee what a photo carries besides the picture — where it was taken, the phone, the time — and remove it without re-saving the picture.

Signature Resizer for FormsNewTurn a photo of your signature into the width, height and file size an online form asks for, with the paper made clean white.

Adjust Image: Brightness, Contrast, ColourNewBrighten a dark photo, add contrast or colour, turn it black and white, blur or sharpen it — with a live preview, one photo or many.

Watermark ImageNewPut your name or logo on photos — in a corner, the centre, or repeated across the picture — at the size and strength you choose, one or many at once.

Image Colour Picker and PaletteNewPick any colour from a picture and get its hex, RGB and HSL codes, and the picture’s main colours as a palette to copy.

Design Studio — ID Cards, Certificates, Posters, ThumbnailsNewDesign ID cards, certificates, posters, thumbnails and social graphics with shapes, text, pictures and layers; save as SVG, PNG, JPEG or PDF.

Device Tests

19 tools

Device Check — Full Laptop and Phone TestNewTest a whole laptop, PC or phone in one place: screen, keyboard, mouse, touch, speakers, microphone, camera, graphics, storage and battery, with a report to save.

Monitor Test — Dead Pixels, Bleed and BandingNewFull-screen test patterns for dead and stuck pixels, backlight bleed, uniformity, banding, black and white levels, sharpness and motion blur, with a note of what you found.

Camera TestNewCheck your webcam or phone camera works: a live preview, its resolution and frame rate, every camera to choose from, and a still to save.

Screen ResolutionNewYour screen resolution in device and CSS pixels, the browser viewport, pixel ratio, aspect ratio, refresh rate, colour depth and HDR.

Microphone TestNewCheck your microphone works: a live level meter, a plain verdict (too quiet, good, clipping), and a five-second recording to play back.

Keyboard TestNewPress every key and see it light up: find dead or stuck keys, check rollover, and see the code and location each key sends.

What Is My BrowserNewWhich browser, version, engine and operating system you are using — Windows 11 told apart from 10 — with your user agent, languages and settings.

Speaker TestNewCheck your speakers or headphones: left and right channels one at a time, test tones from deep bass to treble, and a 20 Hz–20 kHz sweep.

Mouse TestNewTest every mouse button, the scroll wheel and side buttons, catch a mouse that double-clicks by itself, and estimate its report rate.

Gamepad TestNewTest a game controller in the browser: every button and trigger, both sticks with drift at rest, and vibration — Xbox, PlayStation and more.

WebGL and GPU TestNewCheck that WebGL and WebGPU work: a real test drawing, your graphics card’s name, the limits browsers see, and a warning if graphics run in software.

Touch Screen TestNewCheck a touch screen: how many fingers it tracks at once, and draw across it to find spots that do not respond.

Browser Feature DetectorNewOver seventy web features checked in your browser — graphics, storage, devices, workers, security and CSS — with a report to copy.

Clipboard TestNewCheck copy and paste work, and see everything on your clipboard — plain text, the hidden HTML formatting, pictures and files — without it leaving your device.

Browser Storage TestNewHow much a site may store in your browser, how much this one uses, and whether local storage, IndexedDB, cache and cookies work or are blocked.

WebRTC TestNewCheck WebRTC works for browser video calls: a real connection made inside the page, the candidates your device offers, and whether your local address is hidden.

Notification TestNewSend yourself one test notification to check browser notifications work, see whether this site is allowed, and find where your system hides them.

Network InformationNewOnline or offline, live, and what your browser estimates about the connection: quality class, rough speed, round trip, type and Data Saver.

Battery InformationNewYour battery level, whether it is charging, and the browser’s estimate of time to full or time left, updated live (Chrome, Edge and other Chromium browsers).

Gaming Tools

7 tools

Aim Settings — Sensitivity for Every Game, cm/360 and eDPINewEnter your DPI and sensitivity once: your cm/360 and eDPI, and the same feel in CS2, Valorant, Apex, Overwatch 2, Call of Duty and more, at any DPI. Setups saved.

CPS TestNewTest your clicks per second over 1, 5, 10, 30 or 60 seconds, timed from your first click, with mouse, touch or the keyboard. Your best is kept on your device.

Sensitivity ConverterNewConvert mouse sensitivity between CS2, Valorant, Apex Legends, Overwatch 2, Call of Duty and more, or to a new DPI, keeping the same cm/360 turn.

eDPI CalculatorNewWork out your eDPI (DPI × sensitivity) and cm/360 — how far your mouse moves for a full turn — for CS2, Valorant, Apex, Overwatch 2, Call of Duty and more.

Drop Chance CalculatorNewWork out the real chance of a 1-in-N loot drop in a number of tries, the tries for a 50%, 90% or 99% chance, and the odds of several drops. Exact maths.

FPS to Frame Time CalculatorNewConvert frames per second to milliseconds per frame and back, compare with your screen’s refresh rate, and see why 144 to 240 FPS gains less than 30 to 60.

FOV CalculatorNewConvert field of view between horizontal and vertical, and see how a FOV set at 4:3 looks at 16:9, 21:9 or 32:9 — the trigonometry games use, shown.

Charts & Graphs

6 tools

Chart Studio — Bar, Line, Pie, Scatter and HistogramNewPaste a table once and draw it as a bar, line, pie, scatter or histogram, with the right chart suggested for your data. Download SVG, PNG or CSV. Data stays in your browser.

Bar Chart MakerNewMake a bar chart from pasted spreadsheet data: upright or sideways, grouped or stacked, up to 8 series. Download SVG, PNG or CSV. Data stays in your browser.

Pie Chart MakerNewMake a pie or donut chart from pasted data, with each part’s share, the total in the middle and the smallest parts grouped as Other. Download SVG, PNG or CSV.

Line Chart MakerNewMake a line chart from pasted data: up to 8 lines, labelled at their ends, gaps where values are missing, tooltips and a table view. Download SVG, PNG or CSV.

Scatter Plot MakerNewMake a scatter plot from pasted x and y data, with a least-squares trend line, its equation and r², up to three groups and names in tooltips. SVG or PNG.

Histogram MakerNewMake a histogram from a list of numbers: tidy bins (Sturges’ rule or your own count), counts per bin, and the mean, median and standard deviation. SVG or PNG.

Vehicle & Travel

9 tools

Fuel Cost CalculatorNewWork out the petrol or diesel cost of a drive from the distance, your mileage in km/L, L/100 km or mpg, and the price at your pump, one way or there and back.

Road Trip Planner — Fuel, Stops, Days and Cost per PersonNewPlan a road trip leg by leg in a petrol, diesel, CNG or electric car: driving time and days, fuel or charge, where to refuel, tolls, stays, food and each person’s share.

Mileage CalculatorNewFind the mileage your car or bike really gets, by the tank-to-tank method: odometer and litres at each full fill, each stretch and overall, and cost per km.

Trip Cost CalculatorNewWork out a road trip’s cost: fuel for the distance at your mileage and pump price, plus tolls, parking and more, split between the people going, to the paisa.

Travel Budget CalculatorNewPlan a trip budget: tickets, stay, food, local travel, activities and a buffer, for any number of travellers, with the total per person and per day.

EV Charging Cost CalculatorNewWork out what charging an electric car or scooter costs: units drawn with charging losses, the cost at your rate, the time on your charger and cost per km.

Packing ChecklistNewA packing list made for your trip — days, weather, beach, trek or business, flying, abroad, children. Tick items off, add your own, print. Kept on your device.

EV Range CalculatorNewWork out how far your electric car or scooter can go on its charge: usable battery above your reserve over the energy it uses per km, and harder driving too.

Vehicle Depreciation CalculatorNewWork out what your car or bike is worth year by year: a share lost each year or the same amount each year, at your own rate, with a table of every year.

Home & Everyday

8 tools

Renovation Estimator — Paint, Tiles, Flooring, WallpaperNewMeasure each room once and choose its finishes: the paint, tiles, flooring and wallpaper to buy, room by room, with materials and labour costed. A shopping list to keep.

Electricity Cost CalculatorNewWork out the units (kWh) your appliances use in a month and what they cost at the rate on your bill: fans, lights, AC, TV and more, each with its share.

Home Budget CalculatorNewPlan a monthly household budget: income, monthly and yearly spending, what is left, and needs, wants and savings beside the 50/30/20 guide. Private.

Tile CalculatorNewWork out how many floor or wall tiles to buy: area, tile size (600 × 600, 2 × 2 ft or your own), grout joint, wastage for straight or diagonal, and boxes.

Room Area CalculatorNewWork out the floor area of rooms in square feet and square metres, from feet and inches or metres, plus the wall area less doors and windows, and the volume.

Paint CalculatorNewWork out how much paint a room needs: walls and ceiling less doors and windows, coats and the coverage on your tin, plus wastage — and the tins to buy.

Flooring CalculatorNewWork out the boxes of laminate, vinyl or wooden flooring to buy: the floor area plus wastage, whole boxes from the area each covers, and the cost at your price.

Wallpaper CalculatorNewWork out the rolls of wallpaper to buy from your walls, their height, the roll size and the pattern repeat, counting whole drops per roll as decorators do.

Audio & Video

14 tools

Screen RecorderNewRecord your screen, a window or a browser tab, with its sound and your microphone. Pause, resume and download the video: no install, no watermark, no upload.

Video Toolkit — Details, Frames, Contact Sheet and SoundNewOpen a video once and do everything with it: see its codec and details, save frames as images, make a contact sheet, and save its sound as WAV. Never uploaded.

Voice RecorderNewRecord your voice in the browser with pause and resume, a live level meter and as many takes as you like. Download each one, or as WAV. Nothing is uploaded.

Audio TrimmerNewCut part of an MP3, WAV, M4A, OGG or FLAC file on its waveform, with fades, mono and normalise, and save it as WAV. The file never leaves your device.

Online Tuner and Pitch DetectorNewTune a guitar, bass, ukulele or violin, or find the note you sing or play: note, cents sharp or flat and the frequency, from your microphone. A4 adjustable.

Video Trimmer — Cut a Clip from a VideoNewCut the part you want out of an MP4, MOV, WebM or MKV video: fast without losing quality, or exact to the frame. The sound can be removed. Never uploaded.

Video to GIF MakerNewTurn a part of an MP4, MOV, WebM or MKV video into an animated GIF: choose the start, the end, the frame rate and the width, see it, and save it. Never uploaded.

Webcam RecorderNewRecord video from your webcam or phone camera with sound, in 480p, 720p or 1080p, with pause and a mirrored preview. Download it. Nothing is uploaded.

BPM Detector and Tap TempoNewFind the tempo of a song or loop in BPM from the audio file, with half and double time and beat lengths in ms, or tap along to count it yourself. No upload.

Video Frame ExtractorNewSave any frame of a video as a JPG or PNG image, or one every few seconds or a number spread evenly, in one ZIP. Full size or smaller. Nothing is uploaded.

GIF Frame ExtractorNewOpen an animated GIF and see every frame with how long it shows, then save one frame or all of them as PNG images in a ZIP. Never uploaded.

Video Details (Metadata Viewer)NewSee what a video file holds: codec, resolution, aspect ratio, frame rate, bitrate, rotation, audio tracks and when it was recorded. Read in your browser.

Audio Spectrum AnalyzerNewSee the frequencies in a sound from your microphone or an audio file: a live spectrum on a log scale, the loudest frequency and its note, and the waveform.

Video Thumbnail SheetNewMake one image of a video’s frames in a grid — a contact sheet — with the time on each frame and the file’s details at the top. JPG or PNG, up to 4K wide.

Study Calculators

8 tools

CGPA to Percentage ConverterNewConvert CGPA to percentage with the CBSE rule (CGPA × 9.5) or your university’s own formula, and turn a percentage back into CGPA. Exact to two places.

Flashcards — Spaced Repetition Decks and TestsNewMake flashcard decks or import them from a spreadsheet, Anki or Quizlet, study with spaced repetition and test yourself. Saved on your device; works offline.

Marks Percentage CalculatorNewWork out your percentage from marks in each subject, out of any maximum, with each subject’s percentage and the best five as board results are often quoted.

CGPA CalculatorNewCalculate your CGPA from each semester’s SGPA, weighted by credits as universities do, and the SGPA you need next semester to reach a target CGPA.

Grade Tracker — SGPA, CGPA and Percentage for Every SemesterNewTrack your whole degree: every semester’s courses or SGPA, the CGPA after each, backlogs, percentage, and the SGPA you need for a target CGPA. Saved on your device.

GPA Calculator (SGPA)NewWork out your semester GPA (SGPA) from each course’s credits and grade, on the 10-point UGC scale (O to F) or the US 4.0 scale. Exact, rounded half up.

Attendance CalculatorNewWork out your attendance percentage, how many classes in a row you must attend to reach 75% (or any target), and how many you can miss and stay above it.

Final Exam Grade CalculatorNewFind the score you need in the final exam to reach the overall grade you want, from your current grade and the final’s weight, with a table of common targets.

Productivity

9 tools

Countdown TimerNewCount down any time, from seconds to 100 hours, with an alarm, an optional notification and the time left in the tab title. Keeps time in a background tab.

Planner — To-Do List, Priority Matrix and Habit TrackerNewA to-do list with due dates, the urgent/important (Eisenhower) matrix of the same tasks, a habit tracker with streaks, and a weighted decision matrix. Saved on your device; works offline.

Timer Board — Multiple Timers and a Talk TimerNewRun several timers at once: countdowns with alarms, stopwatches, and talk timers that turn amber and red and count overtime, full screen for a room. Survives reloads.

Pomodoro TimerNewA Pomodoro timer: 25-minute focus sessions, short breaks and a long break after four, all adjustable, with a beep and optional notification at each change.

Online StopwatchNewA stopwatch with laps to the hundredth of a second, fastest and slowest marked, that keeps time in a background tab and after a reload. Laps download as CSV.

Random Name Picker (Spin the Wheel)NewPaste a list of names and spin the wheel: the pick is made fairly with the browser’s secure random numbers before the wheel turns. Optionally remove each winner.

Interval Timer (Tabata, HIIT)NewAn interval timer for Tabata, HIIT, EMOM and circuits: work, rest, rounds, sets and cool down, with beeps at every change. Keeps time in a background tab.

Random Team GeneratorNewSplit a list of names into random teams by number of teams or people per team, with sizes that differ by at most one, fairly shuffled, and copy them as text.

Meeting Agenda MakerNewWrite a meeting agenda with a length for each item: the start and end time of every item is worked out from the start, with the total. Print it or save it as a PDF.

Business Documents

13 tools

Billing Studio — GST Invoices, Quotes and PaymentsNewFree billing for small businesses: GST invoices and quotations from saved customers and products, numbered by financial year, with payments, receipts, dues and a CSV register.

Resume Builder and Cover Letter MakerNewWrite a resume (CV) and a matching cover letter in eight professional templates — or import your old resume from PDF or Word — see the page as it will print, and save it as a PDF. Nothing is uploaded.

GST Invoice GeneratorNewMake a GST tax invoice or bill of supply: CGST and SGST or IGST worked out to the paise, tax summary, amount in words, printed or saved as PDF.

Payment Receipt GeneratorNewMake a payment receipt for cash, UPI, bank transfer, cheque or card: who paid, how much in figures and words, what for, and any balance due.

Invitation Card MakerNewMake an invitation card for a wedding, birthday, Griha Pravesh, puja, anniversary or naming ceremony — the weekday worked out from the date — and print it or save it as a PDF to share.

Quotation GeneratorNewMake a quotation or estimate with line items, optional GST, a validity date and terms, totalled to the paise, then print it or save it as PDF.

Business Card MakerNewMake a business (visiting) card with your name, title, company and contact details, set out ten to an A4 sheet at the true 3.5 × 2 inch size with cut lines. Print or save as PDF.

Certificate MakerNewMake a certificate of participation, achievement, completion or appreciation: the name, what it is for, who gives it and up to two signatures, printed or saved as PDF.

Letterhead MakerNewMake a business letterhead with your name, address, contact details and GSTIN, then write a letter on it or print it blank as stationery, or save it as PDF.

Price List Maker (Rate Card)NewMake a price list or rate card for a shop, salon, clinic or service: items under headings, prices per unit, a GST note, printed or saved as a PDF.

Menu Card MakerNewMake a restaurant or café menu card: dishes under sections with prices, descriptions and the vegetarian and non-vegetarian marks. Print it or save it as a PDF.

Expense Report GeneratorNewMake an expense claim: each expense with its date, category and bill, totals by category, the advance settled, and what is payable or to be returned.

Packing Slip GeneratorNewMake a packing slip or delivery note listing what is in a parcel, without prices: items, quantities totalled by unit, packages, carrier and tracking.

Science & Engineering

23 tools

Engineering CalculatorNewFifty physics, electrical and chemistry formulas in one place: solve any variable in any unit, see the working, and share the result as a link.

Chemical Equation BalancerNewBalance any chemical equation, ionic and redox ones included, exactly; then find the limiting reagent, the theoretical yield, what is left over and the percent yield.

Periodic Table of the ElementsNewAll 118 elements with atomic number, IUPAC standard atomic weight, group, period and block. Find any element by name or symbol, or browse it as a list.

Ohm's Law CalculatorNewEnter any two of voltage, current, resistance and power to get the other two, in the units you choose, with the formula and working shown.

Molar Mass CalculatorNewMolar mass of any chemical formula — brackets, hydrates like CuSO4·5H2O and all 118 elements — with composition by mass and grams to moles.

Resistor Colour Code CalculatorNewRead a resistor’s colour bands — 3, 4, 5 or 6 — or find the bands for a value, with tolerance, temperature coefficient and E-series checks.

Speed, Distance and Time CalculatorNewEnter any two of speed, distance and time to get the third, in km/h, mph, m/s or knots, with the time in hours and minutes and the pace per km and mile.

Mole Calculator (Grams, Moles, Particles)NewConvert between grams, moles and number of particles with Avogadro’s constant. Type the molar mass, or just the formula, and fill in any two values.

Molarity CalculatorNewEnter any three of mass, molar mass (or just the formula), volume and molarity to get the fourth — how many grams to weigh for a solution.

Power Calculator (P = E/t)NewEnter any two of power, energy and time to get the third, in watts, kilowatts or horsepower, joules, kWh or calories, and seconds to days.

Acceleration CalculatorNewEnter any three of starting velocity, final velocity, acceleration and time to get the fourth, with the distance covered — 0 to 100 km/h, braking and more.

Dilution Calculator (C1V1 = C2V2)NewEnter any three of stock concentration, stock volume, final concentration and final volume to get the fourth, with how much solvent to add.

Voltage Divider CalculatorNewEnter any three of input voltage, the two resistors and output voltage to get the fourth, with the current, power and output resistance.

Engineering Notation ConverterNewWrite any number in engineering notation, scientific notation, with an SI prefix (4.7 kΩ, 22 nF) and as E notation, to the significant figures you choose.

Force Calculator (F = ma)NewNewton’s second law: enter any two of force, mass and acceleration to get the third, in newtons, kilograms, g, pounds and more.

Pressure Calculator (P = F/A)NewEnter any two of pressure, force and area to get the third, then read the pressure in pascals, bar, atm, psi, mmHg and torr side by side.

Torque CalculatorNewTorque from a force on a lever (τ = F × r) or from power and rpm (P = τω): enter any two values to get the third, in N·m, kgf·m, lbf·ft or lbf·in.

Kinetic Energy CalculatorNewEnter any two of kinetic energy, mass and speed to get the third — joules, kilojoules, kWh or calories; kg or pounds; m/s, km/h or mph.

Potential Energy Calculator (E = mgh)NewGravitational potential energy, E = mgh: enter any three of energy, mass, gravity and height to get the fourth, on Earth, the Moon or Mars.

RPM Calculator (Speed and Diameter)NewEnter any two of rpm, diameter and surface speed to get the third: a wheel’s rpm at a road speed, or a drill or lathe’s spindle speed for a cutting speed.

Gear Ratio CalculatorNewEnter any three of driver teeth, driven teeth, input speed and output speed to get the fourth, with the gear ratio and what it does to speed and torque.

Wavelength and Frequency CalculatorNewConvert between wavelength and frequency for light, radio and sound (v = f × λ), with photon energy and the part of the spectrum for light.

Momentum Calculator (p = mv)NewEnter any two of momentum, mass and velocity to get the third, in kg·m/s, N·s or lb·ft/s, with the kinetic energy that goes with it.

Games

17 tools

Daily WordGuess the five-letter word in six tries. A new word every day, the same for everyone.

SudokuA daily Sudoku everyone shares, plus unlimited puzzles in three difficulties.

2048Slide and merge number tiles to reach 2048. Keyboard, swipe and offline.

Typing Speed TestNewTest your typing speed in words per minute and your accuracy over 30 seconds, 1 or 2 minutes, with mistakes marked as you type. Best kept on your device.

Memory MatchFlip cards two at a time and find every matching pair in as few moves as you can.

MinesweeperNewPlay classic Minesweeper: beginner, intermediate and expert boards, a safe first click, flags, chording and keyboard play. Best times kept, works offline.

Solitaire (Klondike)NewClassic Klondike solitaire with draw one or draw three, unlimited undo, a finish button once every card is face up, and your best time kept. Keyboard friendly.

ChessNewPlay chess with a friend on one device: every legal move shown, castling, en passant, promotion, check and draw rules, take back, and the game saved as PGN.

SnakeNewPlay the classic Snake game: eat, grow and do not hit the walls or your tail. Three speeds, walls or wrap-around, keyboard, swipe or buttons. Best score kept.

Connect FourNewPlay Connect Four against the computer on easy, medium or hard, or with a friend on one device. Get four in a row. Keyboard friendly, works offline.

CheckersNewPlay checkers (draughts) against the computer on easy, medium or hard, or with a friend: forced captures, multiple jumps, kings. Keyboard friendly, offline.

HangmanNewGuess the word one letter at a time before the figure is drawn: animals, countries, fruit and vegetables, sports or science. Keep your streak going.

Math ChallengeNewAnswer as many sums as you can in 60 seconds: addition, subtraction, times tables and division, at easy, medium or hard. Keyboard friendly, best kept.

Tic-Tac-ToeTwo-player Tic-Tac-Toe, played locally on one device.

BreakoutNewPlay the classic brick breaker: bounce the ball off your paddle to clear every row, with levels that speed up. Arrow keys, mouse or touch. Best score kept.

Number Memory TestNewRemember a number shown for a few seconds, then type it. Each right answer adds a digit. How long a number can you hold? Most people manage about seven.

Pattern MemoryNewTiles light up for a moment; pick them all from memory. Each level adds a tile and the grid grows. Three lives, keyboard or touch, and your best level kept.