JWT Generator

Create HS256/HS384/HS512 JWTs with Web Crypto in LocalKit. Signing stays on-device; pair with the JWT decoder.

Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.

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사용 방법

  1. Open JWT Generator — Open the page and wait for controls.
  2. Edit payload — Paste JSON claims; set algorithm and secret.
  3. Generate — Create the compact JWT locally.
  4. Copy token — Copy the token into your app or decoder.

제한 사항

HS* only. Not a key-management vault.

적합한 경우

Quick local HS* tokens for demos and debugging.

적합하지 않은 경우

Production key ceremony or asymmetric JWT issuance.

개인정보 안내

Secrets and payloads stay in the browser during signing.

자주 묻는 질문（5）

Which algorithms can I sign with?

HS256, HS384 and HS512 via Web Crypto HMAC, as offered on the page. Asymmetric RS* signing is not the focus of this tool.

Is the secret uploaded?

No. Signing stays in your browser. Still avoid pasting production secrets on shared machines or recordings. LocalKit processes this in your browser on www.908885.com—input is not uploaded to our servers for computation.

Can it do RS256?

Not in this tool—use HS* here. For RSA key material experiments see RSA Keygen; for inspecting tokens use JWT Decoder.

Does it verify tokens?

No. This page only signs. Use JWT Decoder to inspect header/payload without treating the token as trusted.

What about the typ header?

Optional typ: JWT is included when the checkbox is on. Keep header claims minimal and aligned with your verifier’s expectations.