API Factory - OpenAPI Viewer & Playground

Instantly detect and preview OpenAPI specs on any page. Explore, validate, and open in your favorite API tools.

API Factory – OpenAPI Viewer & Playground makes working with OpenAPI specs effortless. It automatically detects OpenAPI files (.json or .yaml) on the pages you visit and lets you instantly view, test, and explore APIs directly from your browser. No setup, no external tools required — just open the extension popup and start interacting with the API spec. Why install API Factory? 🕒 Save time – Skip the hassle of copying specs into separate tools. 🔍 Understand faster – See clean, interactive docs instead of raw JSON/YAML. ⚡ Experiment instantly – Test endpoints right in your browser. 🤝 Collaborate easily – Share specs or open them in tools like Swagger UI, Redocly, or validators. 🔒 Stay secure – Everything runs locally in your browser; no data is collected. 👉 Whether you’re an API engineer, a frontend developer integrating APIs, or just exploring a new spec, API Factory helps you go from static file → live, interactive API experience in seconds. Try it now! Open any web page containing an OpenAPI .json or .yaml specification file. Here are some examples we’ve tested: Weather.gov API - https://www.weather.gov/documentation/services-web-api eBay Commerce Catalog API - https://developer.ebay.com/api-docs/commerce/catalog/overview.html DigitalOcean OpenAPI Specs - https://github.com/digitalocean/openapi Twilio IAM API Spec - https://github.com/twilio/twilio-oai/blob/main/spec/yaml/twilio_iam_v2.yaml ✨ OpenAPI specs are code — stop staring, start running. Explore, test, and interact with APIs instantly!