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

6,939 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

5,107 views

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

Use Tool →
🔐

TOTP Code Generator — 2FA Testing Tool

3,796 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 →
{}

JSONL Formatter — Line-by-Line Validator

3,718 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 →
🔑

Password Entropy Calculator — Crack Time Estimator

3,614 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 →
{ }

JSON to Zod — Schema Generator

3,588 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

3,432 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 →
⏱️

Seconds to Time Converter — HH:MM:SS Formatter

3,211 views

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

Use Tool →

Related API & Backend Tools

📡

Server-Sent Events (SSE) Formatter — Build and Debug Real-Time Streams

Build Server-Sent Events messages with id, event, data, retry, and comment fields for testing SSE endpoints. Fill in each field individually and instantly see the correctly formatted SSE message string with double-newline terminator. Supports multi-line data fields, keep-alive comment lines, and an escaped wire-format view. Five presets cover the most common SSE patterns. Free and runs entirely in your browser.

Use Tool →
📋

API Changelog Generator — Automatically Detect Breaking Changes and Write Release Notes

Convert API change descriptions into structured Keep-a-Changelog format. Enter a version, date, and one change per line prefixed with its type (added, changed, deprecated, removed, fixed, or security). The tool instantly groups them into the canonical section order and outputs a ready-to-paste CHANGELOG.md block. Supports four real-world presets for REST API releases, breaking changes, patch releases, and unreleased work. Free and runs entirely in your browser.

Use Tool →
📊

GraphQL Cost Estimator — Analyze Query Complexity and Depth

Assign custom field weights to a GraphQL schema and calculate the total query complexity score. Paste any GraphQL query, configure per-field costs, and get a per-field breakdown table showing depth, multipliers, and cumulative cost.

Use Tool →

GraphQL Subscription Builder — Generate WebSocket Payloads and Client Queries

Build GraphQL subscription query strings and generate WebSocket connection code snippets for Apollo Client, urql, and graphql-ws. Define your operation name, variables, and selection fields visually, then copy the ready-to-use code.

Use Tool →
🔄

Postman to OpenAPI Converter — Spec Migration Tool

Convert Postman Collection v2.1 JSON to OpenAPI 3.0 specification format. Upload or paste your collection, and get a downloadable openapi.yaml or openapi.json with mapped paths, parameters, request bodies, and example responses.

Use Tool →
🔑

JWT Token Validator — Signature Verifier

Decode and validate JWT tokens instantly in your browser. Inspect header and payload claims, check expiry, and verify HMAC signatures (HS256/HS384/HS512). Free and private.

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 →
📊

Rate Limit Header Parser — Throttle Info Decoder

Parse and visualize X-RateLimit headers from raw HTTP API responses. Paste response headers to instantly see your quota state — limit, remaining, used, and reset time — displayed as color-coded progress meters. Supports GitHub, OpenAI, Twitter/X, Shopify, and IETF standard rate limit headers.

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