Base64 Encoder/Decoder
Encode text or files to Base64, and decode Base64 back — all locally in your browser, with full Unicode support.
Result
Your result will appear here…
The file is read locally and never uploaded.
Base64 output
Encoded Base64 will appear here…
How to use
- Text mode: type text and hit Encode, or paste Base64 and hit Decode (emojis and non-English text work too).
- File mode: choose a file to encode it to Base64 and download the result as a .txt file.
- To go back the other way, paste Base64, give the file a name, and download it.
Privacy note: everything runs in your browser — your text and files never leave your device.