WEB & API / LIVE
JWT Inspector
decode, don’t trust.
Read a token’s header and claims without verifying or treating its signature as proof.
FREE TO USE / NO ADS / NO LOGIN REQUIRED
Decode a JWT and inspect its claims online
Paste a JWT to read its header and payload as formatted JSON. Inspect claims such as issuer and expiration while debugging authentication, without sending the token to a processing server.
- Decode JWT header and payload JSON
- Display the signature segment separately
- Inspect claims without claiming to verify the token
Paste a three-part token and select Inspect token. Copy the decoded header or payload as needed. Decoding reveals what a token says; this tool does not verify its signature, issuer, audience or trustworthiness.
Popular ways to use JWT Inspector
- Read the header and claims in a token while debugging authentication.
- Check expiration data without treating decoded claims as verified.
How processing and privacy work
Processing runs in your browser. The page may download scripts, fonts or processing engines to run the tool; these downloads are separate from uploading your input files.