hookproof `playground`

Sign a webhook request in your browser, then watch hookproof accept the genuine one and reject every tampered variant — with the exact error code. 100% client-side (Web Crypto).

GitHub · npm · zero dependencies · runs on Node, Bun, Deno, Workers, Edge

Provider

Secret

Raw payload (body)

Fabricated request

hookproof results

The library only verifies. The signing above is demo-only Web Crypto, mirroring each provider's official scheme, so you can produce a genuine request to test against.