OpenAPI Viewer vs Code Runner

OpenAPI Viewer is the easiest way to explore, test, and understand OpenAPI 3.0 and 3.1 specifications on your Apple devices. Whether you're integrating a third-party API, reviewing your team's documentation, or testing endpoints on the go, OpenAPI Viewer gives you a clean, native interface built for developers. EXPLORE YOUR API Open any JSON or YAML OpenAPI file and instantly browse all endpoints organized by tag. Search across operations, schemas, parameters, and examples in seconds. View rich documentation for every endpoint — including descriptions, parameters, request bodies, and responses — with schema constraints, validation rules, and example values displayed clearly. TRY IT OUT Send real HTTP requests directly from the app. Fill in path, query, header, and cookie parameters, provide a request body, configure authentication, and hit Send. View the response body, status code, duration, and validation results — all without leaving the app. EXPORT AND SHARE Copy any request as a cURL command, JavaScript fetch, Swift URLSession, or Python httpx snippet — ready to paste into your terminal or codebase. BUILT FOR APPLE PLATFORMS A thoughtfully designed native UI makes even complex, sprawling APIs easy to read. Color-coded methods, clear badge indicators, and structured layouts — built for Apple platforms from the ground up. FREE TO USE OpenAPI Viewer is completely free with no subscriptions or paywalls. If you find it useful, you can support development through an optional tip jar — entirely your choice. KEY FEATURES • Open JSON and YAML OpenAPI 3.0 and 3.1 specifications • Browse endpoints by tag with HTTP method filters • Full-text search across operations, schemas, examples, and headers • Send real HTTP requests with a built-in inspector • Configure Bearer, API key, Basic, and OAuth credentials • Request history • Copy requests as cURL, fetch, URLSession, or httpx • Schema viewer with constraints, enums, and examples • Native on iPhone, iPad, and Mac

Code Runner turns your phone into a real compiler and code editor. Write code, tap Run, and get real output in seconds — powered by a secure cloud sandbox, not a fake preview. Whether you're a CS student, learning to program, or a developer who wants to test an idea on the go, Code Runner lets you practice and run real code anywhere — no laptop required. RUN REAL CODE ANYWHERE Write and execute real programs in 8 languages: • Python 3 • JavaScript (Node) • C (GCC) • C++ (GCC) • Java • C# (Mono) • Go • Rust SEE OUTPUT INSTANTLY Your code runs in an isolated cloud sandbox and the real output comes back in seconds. Send input through stdin, catch errors, and see exactly what your program prints. A REAL CODE EDITOR A fast, modern editor designed for touch: • Syntax highlighting for every language • Smart autocomplete • Quick-keys bar for the symbols you actually use • Find & replace • One-tap code formatting • Adjustable font size, tab size, line numbers and themes SAVE & REUSE YOUR CODE Save your snippets and keep them ready to run anytime. Your code stays in sync so it's always with you. WORKS OFFLINE Write and edit code anytime — even with no connection. Run it when you're back online. FREE TO START Get 10 code runs every day for free. Upgrade to Pro for unlimited runs and to support ongoing development. Pro is available as a monthly or annual subscription. PERFECT FOR • CS students and self-taught learners • Practicing for interviews and exams • Testing snippets and algorithms on the go • Anyone who codes away from their desk Download Code Runner and carry a compiler in your pocket. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://looplab.app/apps/coderunner/terms-of-service Privacy Policy: https://looplab.app/apps/coderunner/privacy-policy