JWT Validator v1.0
Validate JWT tokens and verify signatures. Check if tokens are expired or properly signed.
No data uploaded – runs 100% in your browser
Used by developers in 120+ countries
v1.0 • Updated Nov 2025
Leaderboard Ad
Sidebar Ad (300x250)
Multiplex Ad
How to Use the JWT Validator
- Paste your JWT token
- Enter the secret key (optional)
- Click 'Validate' to verify
- Review validation results
What is JWT Validator?
A JWT validator checks if a JSON Web Token is properly formatted, not expired, and optionally verifies the signature using a provided secret key.
Why Use a JWT Validator?
- Verify token signatures
- Check expiration status
- Debug authentication issues
- Validate token claims
- Security testing
Frequently Asked Questions
What is JWT validation?
JWT validation checks if a token is properly formatted, not expired, and has a valid signature.
Is this JWT Validator free?
Yes, this JWT Validator is completely free and runs entirely in your browser.
Is my data secure?
All processing is done locally in your browser. No secrets or tokens are sent to any server.