Local Base64 / privacy-first
Encode Base64 locally.
Encode or decode Unicode text as Base64 or Base64URL. Your input stays in this browser and is never uploaded or stored.
Enter text
Up to 5 MiB. Base64 is not encryption or a signature.
Result
Scope
- Input, conversion, copy, and download stay in this browser. There is no upload, external request, or input storage.
- Standard Base64 uses padding; Base64URL uses URL-safe characters and no padding. Invalid input never becomes a success.
- Encryption, signature verification, JWT parsing, and file conversion are out of scope.