JWT Decoder
Decode JWT header and payload (no verification).
Runs locally in your browser. No signup.
How it works
- 1 Paste your input.
- 2 Pick options if needed.
- 3 Copy the output.
Decodes header and payload only; signature is not verified.
FAQ
What is a JWT?
JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties.
Does this verify the signature?
No. This tool only decodes the payload so you can read the contents. It does not verify the signature.
Is my token sent to a server?
No. Decoding happens entirely in your browser. Your token is safe.
Does this tool store my input?
No. Your input is processed locally in your browser and is not uploaded or stored.