JWT decoder
Inspect a JSON Web Token locally in your browser.
JWT Decoder
Decode JSON Web Tokens to inspect the header, payload, and check expiration status. Essential for debugging authentication issues.
How It Works
Paste your JWT token in the input area
The tool decodes the header and payload
See expiration status and all claims
Features
Frequently Asked Questions
Is this tool really free?
Yes, 100% free with no hidden costs or limits. All processing happens.
Do I need an account?
No. The tool is free to use with no sign-up and no limits.
Does this verify the signature?
No, this tool only decodes the token contents. Signature verification requires the secret key which should never be shared publicly.
JWT Decoder Online, The Complete Guide
Need to decode JWT token online? Our free JSON Web Token decoder parses and displays JWT contents instantly. View JWT claims, inspect headers, and debug authentication issues, essential for web developers.
JWT Parser Free
Our JWT parser free tool decodes any JWT in milliseconds. Paste the token, and instantly see the header (algorithm, type), payload (claims, expiration, issuer), and signature. No signup required.
JWT Inspector
The JWT inspector shows exactly what is inside your token. See the signing algorithm (HS256, RS256), token type, and all payload claims including sub, iat, exp, and custom claims from your application.
View JWT Claims
View JWT claims in a readable format. Our decoder formats timestamps (exp, iat, nbf) into human-readable dates, highlights expired tokens, and shows claim values with proper JSON formatting.
Tips for Working with JWTs
- JWTs are encoded, not encrypted, never put sensitive data in them
- Always check the exp (expiration) claim before trusting a token
- Validate tokens server-side; client-side decoding is for debugging only
- All processing happens locally, your tokens stay private
Related Tools
More than a quick jwt decoder.
A JWT decoder lets you inspect the readable header and payload of a JSON Web Token. It is useful for debugging claims, expiry dates, issuer values, and integration settings while you are developing or troubleshooting an authentication flow.
Decoding is not verification. A readable JWT payload does not prove that a token is genuine, unexpired, intended for your application, or safe to trust. Signature validation must happen in the system that is responsible for authentication.
How to use the jwt decoder.
Start with the tool above. There is no account step between you and the result.
- 01
Paste the JWT.
- 02
Read the decoded header and payload.
- 03
Validate the signature and claims in your application before trusting it.
JWT decoder answers.
Useful context before you use the result somewhere important.
Does decoding verify a JWT?
No. It only shows the encoded header and payload.
Can I paste a production token?
Avoid exposing sensitive credentials. Use a safe test token whenever possible.
What should I check first?
Look at the issuer, audience, expiry, and claims expected by your application.
Give the document a place to go.
Keep PDFs, templates, feedback, approvals and signatures together in one workspace.