Free online JWT claims builder — assemble JWT payload objects with standard RFC 7519 claims instantly in your browser. No data is stored. Supports iss, sub, aud, exp, iat, jti claims plus custom key-value pairs.
Issuer (iss) claim
Subject (sub) claim
Audience (aud) claim
Expiration in minutes from now
Include issued-at (iat) claim
Include JWT ID (jti) claim
Custom claims as JSON (e.g. {"role":"admin"})
Free online JWT claims builder — assemble JWT payload objects with standard RFC 7519 claims instantly in your browser. No data is stored. Supports iss, sub, aud, exp, iat, jti claims plus custom key-value pairs.
Runs entirely in your browser. No data is sent to our servers.
Build claims for an API access token with role and permissions
JWT Decoder
Free online JWT decoder — decode JWT tokens into header, payload, and signature instantly in your browser. No data is stored. Parses base64url-encoded header and payload claims, displays the raw signature.
JWT Encoder
Free online JWT encoder — create HMAC-signed JWT tokens instantly in your browser. No data is stored. Supports HS256, HS384, and HS512 algorithms with configurable secret key.
JWT Debugger
Free online JWT debugger — analyze JWT tokens for expiry, format, and claims problems instantly in your browser. No data is stored. Detects expired tokens, missing claims, invalid algorithms, malformed headers, and structural issues.
JWT Expiry Checker
Free online JWT expiry checker — check JWT token expiration status instantly in your browser. No data is stored. Reads exp, iat, and nbf claims, shows remaining lifetime or time since expiry in human-readable format.