JWT Decoder
Paste any JWT token and see its content (Header and Payload) without sending any data to a server.
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🔒 All processing happens inside your browser — your files are never uploaded to any server.
Frequently Asked Questions
Does the tool verify the JWT signature?
No, the tool only shows the Header and Payload content in a readable format; verifying the signature requires the secret key and is normally done server-side.
Is the token I paste sent to any server?
Not at all — decoding happens entirely inside your browser via JavaScript.
Is it safe to paste a real token into the tool?
Since processing is fully local with no network calls during decoding, it's safe; as a general rule though, avoid sharing sensitive production tokens with any external tool when possible.