⚡

Webhook Payload Generator — Template Builder

Generate realistic sample webhook payloads for Stripe, GitHub, Slack, and custom event schemas. Select a provider and event type to instantly produce a correctly structured JSON payload you can copy or download to seed webhook handlers, write tests, and build integrations.

API ToolsAPI & Backend
Loading tool...

How to Use Webhook Payload Generator — Template Builder

How to Use the Webhook Payload Generator

Step 1: Select a Provider

Click one of the four provider buttons on the left panel:

  • Stripe — payment, subscription, invoice, and checkout events
  • GitHub — push, pull request, issues, release, and workflow events
  • Slack — message, reaction, channel, and app mention events
  • Custom — generic app events like user created, order placed, and payment processed

Step 2: Select an Event Type

Once you have chosen a provider, click the event type you need from the list below the provider buttons. Each event shows a short description so you can quickly identify the right one.

Step 3: View the Generated Payload

The right panel instantly shows a realistic, correctly structured JSON payload for that provider and event. All fields follow the provider's actual webhook format — including envelope metadata, nested data objects, and typical field values.

Step 4: Copy or Download

Click Copy to copy the JSON to your clipboard, or click .json to download it as a file named {provider}-{event}.json. Use these payloads to:

  • Seed webhook handler tests (Jest, Pytest, etc.)
  • Configure webhook simulator tools
  • Build and debug event consumers locally
  • Document webhook integrations

Supported Events

Stripe (8 events) payment_intent.succeeded, payment_intent.payment_failed, customer.created, customer.subscription.created, customer.subscription.deleted, invoice.payment_succeeded, checkout.session.completed, charge.refunded

GitHub (8 events) push, pull_request (opened), pull_request (merged), issues (opened), issues (closed), create (branch), release (published), workflow_run (completed)

Slack (6 events) message, reaction_added, channel_created, member_joined_channel, app_mention, file_shared

Custom (6 events) user.created, user.updated, order.placed, payment.processed, subscription.renewed, password.reset

Frequently Asked Questions

Most Viewed Tools

📺

Screen Size Converter — Diagonal Dimension Tool

7,889 views

Calculate screen width and height from diagonal size and aspect ratio. Convert between inches and centimeters for displays, TVs, and monitors with instant dimension calculations.

Use Tool →
🖨️

DPI Calculator — Print Resolution Tool

6,139 views

Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.

Use Tool →
⏱️

Seconds to Time Converter — HH:MM:SS Formatter

4,392 views

Convert seconds to HH:MM:SS time format instantly with precise calculations and easy-to-read formatting.

Use Tool →
🔐

TOTP Code Generator — 2FA Testing Tool

4,042 views

Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.

Use Tool →
🔑

Password Entropy Calculator — Crack Time Estimator

4,019 views

Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.

Use Tool →
{}

JSONL Formatter — Line-by-Line Validator

3,883 views

Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.

Use Tool →
{ }

JSON to Zod — Schema Generator

3,705 views

Generate Zod validation schema code from a JSON sample object. Infers z.string(), z.number(), z.boolean(), z.array(), z.object(), and z.null() types automatically. Handles nested objects, arrays of objects with optional field detection, and outputs copy-ready TypeScript with import and z.infer type alias.

Use Tool →
🔐

TLS Cipher Suite Checker — Strength Analyzer

3,694 views

Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.

Use Tool →

Related API & Backend Tools

🗄️

HTTP Cache Header Generator — Optimize Browser & CDN Caching

Generate Cache-Control, Vary, and ETag headers for web and API responses. Select a caching strategy (public, private, no-cache, no-store), set browser and CDN TTLs, and configure advanced directives like stale-while-revalidate. Outputs ready-to-use snippets for nginx, Express.js, and Apache.

Use Tool →
🔐

OAuth Token Validator — JWT & OIDC Decoder

Validate and inspect OAuth tokens in your browser. Decode JWT access tokens and ID tokens to view claims, scopes, and expiry. Analyse opaque tokens for entropy and format. Free and private.

Use Tool →
🔀

CORS Header Generator — Cross-Origin Config Tool

Build CORS configuration headers interactively for web servers and APIs. Set allowed origins, methods, request headers, credentials, and preflight cache duration — then copy the generated Access-Control headers or ready-to-paste code snippets for nginx, Express.js, Flask, and .NET.

Use Tool →
🔁

Webhook Retry Config Calculator — Simulate Exponential Backoff & Jitter

Configure exponential backoff parameters and preview the full retry schedule for webhook delivery. Enter max attempts, initial delay, multiplier, jitter, and a max delay cap to instantly see each retry timestamp, cumulative elapsed time, jitter range, and which delays hit the cap. Supports presets for standard, aggressive, conservative, Stripe-style, and fixed-interval retry policies. Free and runs entirely in your browser.

Use Tool →
🔌

API Tester — In-Browser REST Client

Test HTTP API endpoints directly in your browser. Make GET, POST, PUT, PATCH, and DELETE requests with custom headers and request bodies. View status codes, response headers, and pretty-printed JSON responses — all client-side, no server proxy.

Use Tool →
🐇

AMQP Exchange Configuration Simulator — Map Routing Keys and Queue Bindings

Generate RabbitMQ channel declaration code for Node.js (amqplib) and Python (pika). Select an exchange type, configure durability and options, add queue bindings with routing keys, and instantly get production-ready assertExchange and bindQueue calls. Supports all four exchange types: direct, fanout, topic, and headers. Four presets cover the most common RabbitMQ patterns. Free and runs entirely in your browser.

Use Tool →
◇

GraphQL Query Formatter — Mutation & Subscription Tool

Format and prettify GraphQL queries, mutations, subscriptions, and fragments with correct indentation.

Use Tool →
🔍

API Error Decoder — Fix Suggestion Tool

Decode HTTP status codes and OAuth 2.0 error strings with plain-English descriptions, common causes, and actionable fix suggestions. Covers every HTTP 1xx–5xx status code and all standard OAuth 2.0 error responses. Results appear instantly as you type.

Use Tool →

Share Your Feedback

Help us improve this tool by sharing your experience

We will only use this to follow up on your feedback