Featured Product
Cheat Sheet
GraphQL Cheat Sheet
Comprehensive GraphQL cheat sheet covering SDL schema types, queries, mutations, subscriptions, resolvers, DataLoader, Apollo Client, pagination, error handling, and performance best practices.
REST API Cheat Sheet
Complete REST API cheat sheet covering HTTP methods, status codes, headers, authentication, JSON request and response formats, pagination, filtering, versioning, caching, idempotency, and API best practices.
Convert Tools
cURL to Fetch
Convert curl commands to JavaScript fetch() code instantly. Supports async/await, promise chains, and bare fetch. Handles headers, JSON bodies, FormData, basic auth, and cookies.
cURL to PHP
Convert curl commands to PHP code instantly. Supports PHP cURL extension, Guzzle HTTP client, and file_get_contents. Handles headers, JSON bodies, form data, basic auth, cookies, and TLS options.
cURL to Python Requests
Convert curl commands to Python code instantly. Supports requests, httpx (sync & async), and urllib. Handles headers, JSON bodies, form data, basic auth, cookies, and TLS options.
Dev Tools
cURL Parser
Parse curl commands and inspect every part of the HTTP request — method, URL, query parameters, headers, body, basic auth, cookies, and flags — broken down into a clean structured view. 100% client-side.
HTTP Request Parser
Parse raw HTTP requests online. Instantly break down method, URL, path, query parameters, headers, and body into structured tables. Supports all HTTP methods and JSON body formatting.
OpenAPI Diff Viewer
Compare two OpenAPI / Swagger specs (JSON or YAML) and instantly see breaking, non-breaking, and informational changes — endpoints, parameters, responses, and schemas. 100% client-side.
Generator
Curl Command Builder
Build cURL commands online with method, URL, headers, query params, auth, request body, and common options. Instant copy-ready output in your browser.
GraphQL Query Builder
Build GraphQL queries online with variables, field selection, JSON body preview, and copy-ready cURL output for fast API testing.
HTTP Header Builder
Build HTTP request headers visually and export as raw HTTP, cURL, JavaScript fetch, Python requests, or Node.js code. Header autocomplete, value presets, and copy-ready output.
OpenAPI Generator
Generate OpenAPI 3.0 (Swagger) specifications online. Build API info, servers, paths, parameters, request bodies, and responses. Export as YAML or JSON instantly.
Query String Builder
Build and parse URL query strings online. Add key-value pairs, choose array styles (repeat, brackets, indices, comma), control encoding, sort, and copy ready-to-use query strings or full URLs.
Request Payload Builder
Build HTTP request payloads visually — JSON, form-data, URL-encoded, XML, GraphQL, and raw. Live preview with copy and download. Free online tool.