Decode JSON Web Tokens (JWT) to view header, payload, and signature. Check token expiration and validate JWT format. Free, secure, and privacy-first.
Decoded JWT will appear here
Enter a JWT token above to decode it
This free online tool decodes JSON Web Tokens (JWT) and displays their header, payload, and signature components. Perfect for developers working with authentication and authorization systems.
This tool only decodes JWT tokens - it does not verify signatures. Never paste production tokens containing sensitive information into online tools. For signature verification, use server-side validation with the appropriate secret key.
All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.