Encode Unicode text or local files and decode Base64 into UTF-8 text or exact binary bytes.
Useful to know
Why does decoded text sometimes fail?
The Base64 may represent an image, archive or text in a different encoding. Choose binary-file decoding to keep the exact bytes. This tool only interprets decoded text as UTF-8.
Can I use Base64url for a web token?
Choose Base64url to use – and _ instead of + and /. Output omits padding. The decoder accepts correct optional padding and rejects characters from the wrong alphabet.
Does Base64 hide confidential information?
No. It is a reversible encoding. It is not encryption, authentication or a password-protection method.
Where are my files and inputs processed?
This tool processes your entries on your device. It does not upload them or save them in an account. Downloads remain on your device; Reset clears the current tool workspace.
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