About JWT Decoder
The JWT Decoder at Online Tool Base parses JSON Web Tokens to reveal their payload without verifying the signature. It is a debugging tool for OAuth and OpenID Connect flows.
Why Use This Tool?
Auth tokens contain user roles, expiration times (`exp`), and issuers. **onlinetoolbase.online** lets you inspect these claims instantly to understand why a login failed or a session expired.
Key Features
- Three-Part View: Header, Payload, and Signature.
- Time Parsing: Converts unix timestamps to human-readable dates.
- Color Coding: Visual separation of token parts.
How to Use
- Paste your JWT String (ey...).
- See the decoded JSON immediately.
Security Note
We do not store your tokens. Decoding happens locally. Do not paste production tokens on untrusted networks.