HMAC Signature & Webhook Tester
Security workbench: sign raw webhook payloads with your secret, compare to provider headers (Stripe-style v1= supported), minify JSON for stable signatures — Web Crypto in your tab.
Frequently asked questions
No. HMAC digests are computed in-browser. Nothing is sent to LocalTools servers for processing.
Prefer test credentials; any website could theoretically exfiltrate clipboard or DOM data if compromised.