🔑 Enter JWT Token
Pure Frontend · Header/Payload Parsing · Standard Claims · Expiration Check
Zero Dependencies · Works OfflineThe JWT Claims Extractor is a pure frontend online tool for parsing JWT Token Header and Payload, extracting all Claims. Supports RFC 7519 standard Claims (iss, sub, aud, exp, nbf, iat, jti) and custom Claims, with automatic expiration detection and descriptions for each standard Claim. All decoding happens locally in the browser.
Step 1: Paste your JWT Token in the input area.
Step 2: Click "Parse" or press Ctrl+Enter.
Step 3: Review Header, Claims, and Token status.
Step 4: Copy the Claims data you need.
Developers check Token Claims to verify identity and permissions when debugging OAuth2/OIDC flows.
Quickly check exp, aud and other key fields when troubleshooting expired or mismatched tokens.
Security teams review signing algorithms, expiration policies, and Claims for security compliance.
Beginners understand JWT structure and Claims by parsing real tokens.
JWT (JSON Web Token) consists of three parts: Header.Payload.Signature, separated by dots. Header contains metadata (algorithm, type), Payload contains Claims, and Signature verifies integrity. RFC 7519 defines 7 standard Claims: iss (issuer), sub (subject), aud (audience), exp (expiration), nbf (not before), iat (issued at), jti (JWT ID). JWT Payload is only Base64Url-encoded, not encrypted, so never store sensitive data in Claims.
JWT Claims are statements in the Payload such as iss (issuer), sub (subject), aud (audience), exp (expiration), iat (issued at), and custom fields.
No. This tool only decodes Header and Payload. Signature verification requires secret keys and is not safe in the browser.
No. All decoding happens locally. Token data never leaves your device.
Currently only JWS (signed JWT) is supported. JWE (encrypted JWT) is not yet available.
After parsing, the exp Claim is automatically compared with current time to show status and remaining time.
All RFC 7519 standard Claims: iss, sub, aud, exp, nbf, iat, jti, plus OpenID Connect extensions.