JWT Generator (HS256)
Create a signed JSON Web Token from your own payload and secret using the HS256 algorithm. A JWT packs a header and a payload into two base64url segments and appends an HMAC-SHA256 signature, so a server that shares the secret can verify the token has not been tampered with. This generator builds the standard header for you, base64url-encodes your JSON payload, and signs it with your secret using the browser native Web Crypto API, giving you a complete token you can paste into an Authorization header for testing. Pair it with the JWT decoder to inspect what you produced. Enter your payload JSON and a secret, then click generate. Everything runs in your browser, so your secret is never sent to a server.
How to use JWT Generator (HS256)
- Enter your payload claims.
- Provide the signing secret.
- Generate the HS256 token.
- Copy the signed JWT.
Frequently asked questions
What algorithm does it sign with?
It signs the token with HS256, an HMAC using SHA-256, computed through the Web Crypto API from your payload and secret.
What do I need to provide?
You supply the payload claims and a secret key, and the tool builds the header, encodes the parts and appends the signature.
Does it pair with a decoder?
Yes. The tokens it produces can be inspected with the JWT decoder to confirm the header and payload.
What is JWT Generator (HS256)?
Create a signed JSON Web Token from your own payload and secret using the HS256 algorithm. A JWT packs a header and a payload into two base64url segments and appends an HMAC-SHA256 signature, so a server that shares the secret can verify the token has not been tampered with.
Is JWT Generator (HS256) free to use?
Yes. JWT Generator (HS256) is completely free, with no sign-up and no usage limits.
Does JWT Generator (HS256) work in a web browser?
Yes. JWT Generator (HS256) runs in any modern web browser. There is nothing to download or install.
Is my data private with JWT Generator (HS256)?
Yes. JWT Generator (HS256) runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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