Base64 Encoder and Decoder
Convert text to Base64 and back, or encode a small file. Works with accented characters and emoji. Everything runs in your browser. Your files and text are not uploaded to our servers.
Use the tool
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How to use it
- Choose Encode or Decode.
- Paste your text. Results update as you type.
- Tick URL-safe if the value will go inside a URL or token.
- Select Copy result, or encode a file below the tool.
Tips for best results
- Base64 is an encoding, not encryption. Anyone can decode it, so never use it to protect secrets.
- Files are limited to 5 MB to keep your browser responsive.
Frequently asked questions
Is Base64 secure?
No. It only changes how data is written so it can travel through text-only systems. It offers no protection.
Why does decoding fail?
The input probably contains characters that are not valid Base64, or it was cut off. Check for missing characters.