How to Use JWT Decoder
Paste a JWT to instantly decode its Base64URL-encoded header and payload and read human-friendly issued-at and expiry times. Decoding is done locally; the token is never sent anywhere. Note this tool inspects tokens — it does not verify signatures.
Open the JWT Decoder tool →What is JWT Decoder?
Decode a JSON Web Token to inspect its header, payload and claims — entirely offline. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use JWT Decoder
- Open the JWT Decoder tool.
- Paste or type your input.
- Set any options provided.
- Copy the result. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
Does this verify the token signature?
No. It decodes and displays the contents only. Signature verification requires the secret or public key and should be done server-side.
Is it safe to paste a real token?
Decoding happens entirely in your browser and nothing is transmitted. That said, treat production tokens as sensitive credentials.
Ready to try it?
Open JWT Decoder →