FREE TOOL · ON YOUR DEVICE
Encode and decode Base64 text for free
Convert UTF-8 text to standard Base64 or recover text from a Base64 string. Alphabet, padding and UTF-8 bytes are validated: invalid characters are never silently replaced. Results are processed in this browser.
- Free with an account
- Strict UTF-8
- Standard Base64
- Choose the conversion
- Process input
- Copy or download
HOW TO USE IT
Three steps.
Choose the conversion
Select UTF-8 encoding or Base64 decoding. Paste text or choose a local UTF-8 file.
Process input
Up to 1 MiB UTF-8 text; Base64 input up to 2 MiB and decoded output up to 1 MiB. Wrapped Base64 lines are accepted.
Copy or download
Get TXT with Base64 or recovered UTF-8 text. Review the result before using it.
NEXT STEP
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Base64 for text: common questions
Does Base64 protect a secret?
No. It is reversible encoding, not encryption. Anyone with the string can decode it.
Does it accept Base64URL or arbitrary binary data?
This tool uses standard Base64 with + and /. Output must be valid UTF-8 text; arbitrary binary files need a different conversion.
Why are some inputs rejected?
The string needs canonical padding and valid UTF-8 bytes. Incorrect padding, nonzero pad bits and invalid text are rejected instead of silently repaired.
Is my text sent to a server?
No. Everything is calculated in your browser as you type; the text is not sent to Cocuyo or any third party and is not stored. You can check it in your browser’s network tools: your file is not sent.
Is it really free?
Yes. You can try it before signing up; to keep using it, we ask for a free account, with no subscription. It uses no credits and does not count toward your 30 welcome uses: it has no usage cap.
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