Free browser tool
JWT Decoder
Decode JWT header and payload locally. This tool does not verify signatures.
Last updated:
JWT decoder
Decode JWT header and payload locally. Signature verification is not performed.
Signature present. This decoder does not verify it.
Expires 1/1/2030, 12:00:00 AM
Free JWT decoder
Paste a JWT to inspect its header, payload claims, signature presence, and expiry time without sending the token to a server.
Tool description
Decode JWT header and payload sections locally so you can inspect claims, expiry, and signature presence without uploading the token.
Common uses
- Inspect JWT claims while debugging authentication flows.
- Check token expiry from the exp claim.
- Read JWT header algorithm and type values.
How to use JWT Decoder
- 1. Paste a JWT into the token field.
- 2. Review the decoded header and payload.
- 3. Check expiry and remember that the signature is not verified.
FAQs
Does this verify JWT signatures?
No. It only decodes the token. Signature verification requires the correct secret or public key.
Is the token uploaded?
No. Decoding runs locally in your browser.
Can I paste production tokens?
Avoid pasting sensitive production tokens into any tool unless you fully trust the environment and understand the risk.