JWT Decoder
Decode JWT headers and payloads, inspect claims, and check expiry fields at a glance.
JWT Decoder is built for quick token inspection, claim review, and expiry checks without sending tokens to a backend service.
What is JWT Decoder?
JWT Decoder is built for quick token inspection, claim review, and expiry checks without sending tokens to a backend service.
Use it to read a JWT Header and Payload while debugging claims, issuer, audience, roles or expiry. Decoding does not verify the signature.
How to use JWT Decoder?
Step 1
Try the included example input, then replace it with a redacted sample from the system you are debugging.
Step 2
Paste a JWT token into the decoder.
Step 3
Inspect the decoded header, payload, and signature sections.
Step 4
Review the expiry state and copy any section you need.
Example input / output
Inspect the aud and exp claims from a rejected API request, then use JWT Security Inspector for algorithm and configuration checks.
Review the result for completeness before copying it into code, a test, a ticket or another tool.
Example input
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTYiLCJyb2xlIjoiZGV2ZWxvcGVyIiwiZXhwIjoyNTM0MDIzMDA3LCJpYXQiOjE3MDQwMjMwMDd9.c2lnbmF0dXJlExample output
The tool returns a readable, copy-ready result based on the selected action.Practical developer examples
Debug an authorization failure
Compare issuer, audience and role claims with the API configuration while treating the decoded Token as untrusted data.
Check token timing
Read iat, nbf and exp claims, then open Timestamp Converter to verify seconds and UTC assumptions.
Common developer use cases
JWT claims are Base64URL-encoded, not encrypted. Reading them helps diagnose integration problems, but authorization decisions must still rely on server-side signature and claim validation.
Common issues
FAQ
Does JWT Decoder send data to a server?
The interactive transformation is handled in the browser in this frontend build. Analytics and advertising scripts may still load separately for site measurement or ads readiness, so avoid pasting active secrets or regulated personal data.
What input works best in jwt decoder?
Paste raw JWT tokens directly into the input area or use the example button for a quick starting point.
Can I share JWT Decoder output with teammates?
Yes, but review the result first and redact tokens, private keys, customer data, internal URLs, account IDs, and other sensitive values before sending it in a ticket, chat, or pull request.