Dev Toolkit
Password, hash, JWT and URL utilities
JWT encoder
Sign a header and payload into a JSON Web Token.
Algorithm
HMAC only — RSA and ECDSA signing needs a private key, which this app never handles. The header's alg follows this choice.
Secret is base64 encodedDecode the secret before signing, the way jwt.io does.
Token
The signed token appears here
Every tool runs in your browser — no upload, no account, no tracking. Passwords, secrets and tokens never leave this tab.
Don't know how to open the menu?