Webhook payload formatter & headers reference
Format JSON webhook payloads for debugging, load Stripe/GitHub/Shopify samples, and search a bundled cheat sheet of common signature and metadata headers. Nothing is uploaded.
Frequently asked questions
No. JSON formatting and the headers table run only in this tab. Nothing is sent to LocalTools servers for processing.
No—it formats JSON and lists common headers. Use the HMAC & Webhook Verifier to compute and compare HMAC digests locally.
Stripe, GitHub, Shopify, Slack, Twilio, Svix, Mailgun, PayPal, plus generic Content-Type and tracing headers—embedded offline, no API calls.