Decode a JSON web token.
Paste a JWT and see its header and payload decoded and readable, instantly and privately.
Get started freeKey points
- Paste a JWT and see its header and payload decoded and readable.
- Inspect claims, expiry, and the signing algorithm at a glance.
- Runs locally in your browser. Tokens are never sent or logged.
- Decodes only; signature verification still belongs server-side.
Drop your JWT decoder here and get a link in seconds.
Try it freeDebugging authentication usually means staring at a JWT: three Base64 segments separated by dots, unreadable until decoded. This tool splits the token and decodes the header and payload so you can see the claims, the expiry, and the signing algorithm at a glance. Paste a token to inspect it.
A JWT is Base64 under the hood, so the encode or decode Base64 is the more general tool when you're decoding something that isn't a token. The payload is JSON, and once decoded the the JSON formatter will pretty-print it if it's dense.
When you need to share a decoded payload with a teammate while debugging, host any file type it and send a link rather than pasting it into chat. Everything else is in the free developer tools.
The decoder runs locally and logs nothing, which matters because tokens are sensitive. Hosting plans, unrelated to the tools, are on a paid plan.
Frequently asked questions
Is it safe to paste a token here?
Decoding runs entirely in your browser and nothing is logged or transmitted. Still, treat production tokens with care and avoid pasting live credentials anywhere unnecessary.
Does this verify the signature?
No. It decodes the header and payload so you can read them. Signature verification requires the secret or public key and should happen server-side.
Why does my token show as expired?
The decoded payload includes the 'exp' claim. If that timestamp is in the past, the token is expired.
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