JSON Webhook Tester

What Is a Webhook?

A webhook is an HTTP callback — a way for one system to send real-time data to another system when a specific event occurs. Unlike traditional APIs where you poll for data, webhooks push data to you automatically. Common examples include Stripe sending payment events, GitHub notifying you of code pushes, and Slack posting messages to channels.

When testing webhook integrations, you need to send sample payloads to your endpoint to verify handling, parsing, and response. This tool lets you craft and send those test payloads with the right headers and signatures.

How to Use

1. Enter the webhook URL — The endpoint your service exposes to receive webhooks.
2. Set the event type (optional) — Sent as the X-Webhook-Event header to help your handler identify the event.
3. Compose the JSON payload — Write your JSON or load a template to get started quickly.
4. Add custom headers — Include any webhook-specific headers your service expects (e.g., X-Hub-Signature, X-Stripe-Signature).
5. Set a signing secret (optional) — Automatically computes an X-Hub-Signature-256 HMAC header.
6. Click Send Webhook — The payload is sent via our proxy and the response is displayed.

Common Webhook Events

FAQs