Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text in one click. This tool is fully UTF-8 aware, so emoji and non-Latin characters round-trip correctly, and it handles invalid Base64 gracefully with a clear error instead of crashing. You can also encode a local file's bytes to Base64 - useful for data URLs and inline assets.

All encoding and decoding runs in your browser using the native Base64 routines, so nothing you paste or upload ever leaves your device. That makes it safe for tokens, credentials, and private files, and it keeps working offline after the page loads. Switch direction, paste your input, and copy the result instantly.