JWT Generator
Generate JSON Web Tokens (JWT) with custom headers and payloads. Create signed tokens using HMAC SHA-256 algorithm for authentication, API access, and secure data exchange. Add standard claims like expiration time, issued at, and more with one click.
Keep this secret safe! Used to sign the token.
How to Generate JWT Tokens
JSON Web Tokens (JWT) are an industry-standard method for representing claims securely between two parties. They consist of three parts: a header specifying the algorithm, a payload containing the claims, and a signature that verifies the token's integrity.
Our JWT generator uses the HMAC SHA-256 algorithm (HS256) to create cryptographically signed tokens. The secret key you provide is used to generate the signature, which must be kept confidential. Anyone with the secret can verify or create tokens.
Standard JWT Claims
- iat (Issued At) - When the token was created
- exp (Expiration) - When the token expires
- nbf (Not Before) - Token not valid before this time
- sub (Subject) - Who the token represents
- jti (JWT ID) - Unique identifier for the token
- iss (Issuer) - Who issued the token
Security Note
This tool generates real, valid JWTs using the Web Crypto API. For production use, always generate tokens server-side and never expose your secret key. Use strong, randomly generated secrets and implement proper token validation on your backend.