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JWT Parser & Validator
Decode, validate, and inspect JSON Web Tokens in your browser. A zero-dependency, client-side tool for developers.
Token Input
Decoded Token
Header Algorithm & Token Type
No token parsed yet. Paste a JWT and click "Parse Token".
Payload Claims & Data
No token parsed yet. Paste a JWT and click "Parse Token".
Signature Verification
Signature verification requires a secret key. Use "Validate Token" to check signature.
JWT Parser & Validator
Free online JWT parser and validator tool. Decode JSON Web Tokens, validate signatures, and inspect JWT claims directly in your browser. No installation required, zero dependencies, works entirely client-side.
Parse JWT tokens, decode base64url encoded headers and payloads, validate token signatures, and inspect JWT claims including exp, iat, nbf, iss, sub, aud, and custom claims.
This tool supports HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, and none algorithms. Perfect for developers working with authentication, OAuth 2.0, OpenID Connect, and API security.
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