Encode or decode Unicode text as Base64 locally.
JWT Decoder
Decode JWT headers and payloads locally without claiming signature validity.
client processing
How to use JWT Decoder
Enter or choose your values, run the tool, and copy or download the result where available. Reset starts a clean calculation.
Private browser processing
This utility runs in your browser. Toolbox does not send its inputs to the server. Saved state is used only where the tool clearly says so.
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