Webhook Payload Parser & HMAC Signature Validator
Inspect, format, and validate webhook JSON payloads and test HMAC SHA-256 signatures directly in your browser. Supporting Stripe, GitHub, Shopify, and Slack event payloads, this utility ensures webhook integration reliability with zero cloud uploads.
Webhook Payload Parser & HMAC Signature Validator
Validate Stripe, GitHub, Shopify, and Slack webhook HMAC-SHA256 signatures client-side.
Interactive Webhook Payload Parser & HMAC Signature Validator Workspace
Inspect raw webhook payloads and validate HMAC-SHA256 signatures for Stripe, GitHub, Shopify, and Slack using client-side Web Crypto API. Generates backend verification code.
How This Tool Works (100% Client-Side Engine)
The tool parses the JSON payload into an interactive formatted tree. Cryptographic signature verification uses the W3C Web Cryptography API (crypto.subtle.sign) with HMAC-SHA256, comparing the calculated hexadecimal digest against the signature header using timing-safe comparison.
Step-by-Step Guide
Paste Webhook Payload & Headers
Paste your raw webhook JSON payload and accompanying signature header into the input panels.
Enter Webhook Secret Key
Input your signing secret key to test cryptographic signature validity locally.
Review Signature Status & Formatted JSON
Verify whether the signature is valid, and inspect beautified JSON payload fields and event types.
Why Use This Tool: Privacy & Performance
Integrating and testing third-party webhooks (from Stripe, GitHub, Shopify, or Slack) requires inspecting unformatted JSON payloads, verifying event types, and validating cryptographic HMAC signatures (like Stripe-Signature or X-Hub-Signature-256). Debugging webhook delivery failures by sending payloads to cloud webhook testing sites exposes live customer IDs, order amounts, and secret signing keys to third-party logs. ToolByte Webhook Payload Parser & HMAC Validator operates completely within your local browser sandbox. You paste raw webhook headers and payloads to beautify JSON structures, inspect event metadata, and cryptographically verify HMAC-SHA256 signatures using the native Web Cryptography API without exposing webhook data over the network.
Common Use Cases & Workflows
Testing Stripe Webhook Signatures Locally
Verify whether a Stripe webhook payload matches its stripe-signature header using your webhook signing secret.
Formatting GitHub Event Payloads
Beautify complex, multi-thousand-line GitHub push, pull_request, or issue webhook JSON payloads for easy inspection.
Debugging Shopify Order Webhooks
Inspect order creation and refund payloads, verifying line items and customer parameters safely.
Simulating Webhook Event Payloads for Development
Edit payload values and generate sample test payloads to mock webhook endpoints during local development.
Technical Limitations & Operational Boundaries
Frequently Asked Questions
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