INSPECT · LOCAL FIRST
Inspect a JWT header and payload locally
Decode the readable sections of a JSON Web Token without sending it to the server.
JWT Inspector Open →HOW TO USE
How to use
- 01
Paste a JWT into the token editor.
- 02
Review the decoded header and payload JSON.
- 03
Check claims carefully, remembering that the signature is not verified.
USE CASES
Use cases
Inspect authentication claims
Review issuer, audience, subject, roles, and expiration during API development.
Debug token formatting
Identify malformed Base64URL or JSON sections.
FAQ
Frequently asked questions
Does this verify the signature?
No. The tool decodes token structure only and does not prove authenticity.
Is my token uploaded?
No. Decoding runs in your browser.