JWT Parser
Decode and inspect JWT tokens.
Runs on your machine. Nothing you paste is uploaded.
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What it does
Paste a JSON Web Token and see its header and payload as formatted JSON right away. The signature segment is shown as-is, and each JSON block has its own copy button so you can grab the claims you need.
If the payload carries an exp claim, the expiry time is converted to your local date and time and flagged when the token has already expired. Malformed tokens get a clear error instead of a half-parsed result. Tokens often grant real access, so decoding happens on your machine and nothing is sent anywhere.
When you would reach for it
- Check which roles, scopes, or user ID an access token actually carries when an API returns 403.
- See exactly when a session token expires while debugging unexpected logouts.
- Inspect the alg and kid fields in a header when wiring up a new identity provider.
- Copy the payload of a token from a log or curl command into a bug report.
Also found by searching
- jwt
- token
- decode
- parse
- json
- web
- auth