What happens with invalid Base64?

The tool detects invalid input and tells you instead of producing garbled text.

Does it handle Unicode?

Yes — decoded bytes are interpreted as UTF-8, so Unicode text is restored correctly.

No. Decoding runs entirely on your device.

Decode Base64 to UTF-8 text instantly. Invalid input is detected clearly. Runs entirely in your browser — no uploads.

Decode Base64 back to readable text instantly. Handy for inspecting tokens, data URIs and encoded API fields.