I Built a Free OpenAPI Mock Server Generator (Mockoon Alternative)

Описание и применение

Браузерный генератор мок‑данных для OpenAPI 3.x, полностью бесплатный и без установки, создаёт реалистичные ответы для каждого эндпоинта.

Задача

Developers need to generate realistic mock responses for OpenAPI 3.x specs without installing desktop apps, creating accounts, or paying for premium features.

Результат

The tool provides instant, per‑endpoint mock data entirely in the browser, eliminating installation, account creation, and data uploads while supporting full OpenAPI 3.x.

Рабочий процесс

• Paste or upload an OpenAPI 3.x JSON/YAML spec into the web page
• The tool parses the spec using a lightweight YAML parser
• It extracts schemas and endpoints from the spec
• For each path+method it generates a realistic mock response matching the response schema
• Click the one‑click copy/download button to obtain the mock data for Postman, curl, or tests

Доказательства

The whole tool is one HTML file plus one JavaScript file (about 400 lines of code).

Источник

Key point: no installation steps, no API calls, no data uploads, no cookie tracking.

Источник