JWT Decoder
Decode JSON Web Tokens and inspect header and payload claims.
Related Tools
What is JWT Decoder?
JWTs carry signed claims between services. This decoder reveals the header and payload JSON for debugging auth tokens.
How to use
Paste your JWT token.
View decoded header and payload.
Check expiration and claims.
Benefits
- Instant decode
- Formatted JSON output
- Expiration check
Frequently Asked Questions
Does this verify the JWT signature?
No. This tool only decodes the token for inspection. Never paste production secrets into untrusted tools.
Is this tool free?
Yes. This tool is completely free to use with no sign-up, no limits, and no hidden fees.
Does my data leave my browser?
No. All processing happens entirely in your browser using client-side JavaScript. Your data is never sent to a server or stored anywhere.
Feedback & report a problem
Found a bug or have a suggestion? Let us know — it helps us improve this tool.
Explore All Free Tools
Free online utilities for text, code, and more — all running privately in your browser.
Browse All ToolsAlways free