Base64 String Encode/Decode

Encode text to Base64 or decode it back.

Runs in your browser: what you paste is never uploaded

URL-safe (- and _, no padding)

Text

Base64

How to use Base64 String Encode/Decode

1Paste or type your inputUse the box above, or click Sample to try it with an example.
2Choose your optionsChoose Encode or Decode, and URL-safe (- and _ without padding) if needed.
3Copy the resultCopy it with one click. Nothing is sent anywhere.

Encode text to Base64 or decode Base64 back to text, with full UTF-8 support and a URL-safe variant.

No. Anyone can decode it; it's a way to carry bytes as text, not a way to hide them.

A variant that uses - and _ instead of + and /, often without = padding, so it can go in URLs and JWTs.

No. The tool runs entirely in your browser and never sends what you type or paste to a server.

Yes. It's free, with no sign-up and no limits.