In development. RVNT is pre-release — not yet security-audited. Source code, public builds, and the iOS / App Store release aren’t available yet. See the roadmap →

JWT Generator

Create & sign a JWT (HS256).

Runs entirely in your browser — nothing you enter is uploaded, logged, or tracked.

Build a signed JSON Web Token from scratch — edit the header and payload (claims), pick the HMAC algorithm and enter a secret, and get a ready-to-use token. Handy for testing APIs and auth flows. Signing happens with the Web Crypto API in your browser; the secret is never sent anywhere.

Signed JWT

Verify it with the JWT Signature Verifier.

Frequently asked questions

Which algorithms are supported?

HMAC signing — HS256, HS384 and HS512 — via the Web Crypto API. (RS/ES private-key signing is not offered here.)

Is the token a real, valid JWT?

Yes — a correctly base64url-encoded, HMAC-signed token that verifies against the same secret (try it in the JWT verifier).

Is my secret sent anywhere?

No — signing is done entirely in your browser; the secret and claims never leave your device.

Related tools

JSON Formatter Format, validate & minify JSON. Base64 Encoder / Decoder Encode & decode Base64, Unicode-safe. URL Encoder / Decoder Percent-encode & decode URLs.

Built by a privacy company

These tools never phone home — the same principle as RVNT itself: a post-quantum, end-to-end-encrypted, peer-to-peer messenger with no servers and no tracking.

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