Base64

How to use

1. Choose a variant

   Select Standard Base64 or Base64url for the input or destination.

2. Choose an operation and enter text

   Select encode or decode, then enter UTF-8 text or a Base64 string.

3. Transform and copy

   Run the transformation, inspect the result, and copy it to your clipboard.

Frequently asked questions

Why is there no = at the end of Base64url output?

This tool emits unpadded Base64url. Its decoder also accepts input with correctly placed padding.

Does the tool detect Standard Base64 and Base64url automatically?

No. Input using + or / in Base64url mode, or - or _ in Standard mode, is rejected instead of guessed.

Can it convert files or arbitrary binary data?

No. This tool handles UTF-8 text only and never reads or uploads a file.