Developer Tools

JSON, encoding, IDs, regex and more. 17 tools, all free.

JSON FormatterFormat, validate, minify and sort JSON, with errors pinned to the line.

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

JWT DecoderRead a JSON Web Token’s header, payload and expiry — decoded in your browser, never uploaded.

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

Text Diff CheckerCompare two texts line by line, with changed words highlighted and a copyable diff.

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

Base64 Encoder & DecoderEncode text to Base64 or decode it back, UTF-8 safe, with a URL-safe option.

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

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

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

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

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

UUID GeneratorGenerate random version 4 UUIDs in bulk, and check what kind of UUID you have.

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

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

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

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