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JWT Decoder

Decode and inspect JSON Web Tokens

Files never stored

What is this tool?

Decodes a JSON Web Token (JWT) and displays its header and payload contents in readable form, useful for debugging authentication issues.

How to use it

Paste your JWT, and the decoded header and payload are displayed automatically.

Decoding a JWT here reveals its contents but doesn't verify its cryptographic signature — a token can be decoded and read without confirming it's actually valid or unaltered.

Watch: JWT Decoder in Action

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