Base64 Encoder & Decoder

Base64 turns any text into a string made of 64 safe characters, so it can travel through systems that only accept plain ASCII — email bodies, URLs, JSON fields and HTTP headers. This tool encodes text to Base64 and decodes Base64 back to readable text, handling every language through UTF-8.

1. Choose Encode or Decode.
2. Type or paste into the input. The result updates as you type.
3. Turn on URL-safe to use - and _ instead of + and /, and drop the = padding.
4. Press the swap button to move the result back into the input and reverse the direction.
5. Copy the result.

• Base64 is an encoding, not encryption. Anyone can decode it; never use it to hide a secret.
• Decoding only shows text. If the data is an image or a file, the tool says so instead of printing unreadable characters.
• Input is limited to 10 MB of text.
• Encoding and decoding happen in your browser. Nothing you paste is uploaded or stored. Base64 is often used to carry credentials in headers — treat decoded output with the same care as the original.

Base64 uses four characters for every three bytes, so output is about a third larger. Text in Hindi or emoji grows more, because each character takes several UTF-8 bytes before encoding.

Standard Base64 uses + and /, which have special meanings in URLs. The URL-safe variant swaps them for - and _ and usually leaves off the trailing = padding. JWTs use it.

The bytes do not form valid UTF-8 text, which usually means the Base64 holds an image, a PDF or compressed data rather than a string.

No. It hides nothing — it is only a way to represent bytes as text. Use encryption if the content needs protecting.