JWT Decoder & Validator Online Free

What is a JWT?

JSON Web Tokens (JWTs) are compact, URL-safe tokens used for authentication and authorization. They contain a header, payload, and signature. Developers use JWTs for APIs, mobile apps, microservices, OAuth flows, and identity systems.

How to Decode a JWT Token Online

1. Copy the JWT token from your application.
2. Paste it into the decoder.
3. Click Decode.
4. Review claims such as exp, sub, aud, iss and iat.

JWT Claims Explained

• sub - Subject
• iss - Issuer
• aud - Audience
• exp - Expiration Time
• iat - Issued At
• nbf - Not Before

FAQ

Is this JWT decoder free?
Yes.

Are tokens uploaded?
No. Decoding happens in your browser.

Can I verify signatures?
You need the correct secret or public key for validation.

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