DiagramAI vs OpenAPI Viewer

Turn your ideas into clear, professional architecture diagrams in seconds. Whether you are an engineer planning a new system, a team lead explaining a complex infrastructure, or a consultant documenting a client's platform, this tool gives you the power to model software architectures with precision and speed. Write your architecture as structured code and see it come to life as an interactive, fully rendered diagram — no manual positioning, no drag-and-drop frustration. Key capabilities: - Live preview that updates as you type, so your diagram always reflects your latest thinking. - Built-in AI assistant that generates architecture code from plain text descriptions. Describe what you want and copy the result directly into your diagram. - Intuitive toolbar with quick-insert actions for actors, systems, containers, components, relations, tags, and styles. - Fullscreen presentation mode, designed for sharing your diagrams on-screen with colleagues or stakeholders. - Export your diagrams in multiple formats, including SVG, HTML, and Markdown. - Backup and restore all your work at any time. - Dark mode and light mode support. - Example diagrams included to help you get started immediately. - Available in English and Spanish. Stop drawing boxes and arrows by hand. Start designing with clarity.

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