🔏 JWT Generator
Create and sign JSON Web Tokens with custom headers, payloads, and secret keys. Supports HS256, HS384, and HS512. Runs entirely in your browser — nothing is sent to a server.
⚙️ Algorithm
Header
Algorithm & Type
Payload
Claims
Quick-add claims:
Signature
Secret Key
19 chars
🔑 Generated JWT
Token will appear here…
💡 Tips
HMAC Algorithms
HS256 uses SHA-256 (128-bit key recommended).
HS384 uses SHA-384 (192-bit key recommended).
HS512 uses SHA-512 (256-bit key recommended).
Security
Never use weak or guessable secrets. JWTs are signed but not encrypted — anyone can read the payload. Use JWE if you need confidentiality.