Base64
Base64 encode and decode — no upload
Encode text or files to Base64 and decode Base64 back to text, using native btoa/atob in your browser.
The file is read with FileReader on this device. Nothing is uploaded.
Encoded or decoded text will appear here.
How do I encode or decode Base64?
- Choose Encode or Decode.
- Paste text, or pick a file to encode.
- Tap Encode or Decode, then copy the output.
Files are read with FileReader locally. Close the page and the content leaves memory.