Text & Code
JWT Decoder
Paste a JSON Web Token and instantly decode its header and payload into readable JSON, with timestamp claims like exp and iat translated into human dates. Decoding happens entirely in your browser — your token is never sent anywhere, so it's safe for real tokens.
- Runs in your browser
- No uploads, instant
- Free, no sign-up
Highlights
- Decoded header & payload JSON
- Human-readable exp / iat / nbf
- Token expiry status
- 100% local — token never uploaded
How to use it
How to use the JWT Decoder
- Step 1
Paste a token
Drop in your JWT (header.payload.signature).
- Step 2
Inspect claims
Read the decoded header and payload.
- Step 3
Check expiry
See whether the token is still valid.
- Step 4
Copy
Copy the decoded JSON if you need it.
FAQ
Frequently asked questions
Does this verify the token's signature?
No. This tool decodes the token so you can read its claims; it does not verify the signature, which requires the secret or public key. Never trust a decoded token's contents without verifying it server-side.
Is it safe to paste a real token here?
Yes. Decoding runs entirely in your browser with no network requests, so your token never leaves your device. That said, treat live tokens carefully and avoid sharing your screen.
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