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All-in-one API platform to design, debug, mock, and test with CI/CD
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Instant, offline‑first OpenAPI client with modern interactive docs
A minimal, powerful API client that renders OpenAPI specs as a modern, interactive reference, syncs with your server, and works across major frameworks.

Scalar provides a fast, offline‑first way to turn any OpenAPI/Swagger document into a sleek, interactive reference. Developers can drop a single HTML file into their project, or embed the CDN script, and instantly get a modern UI that stays up‑to‑date with code changes. The tool is framework‑agnostic, working with FastAPI, Express, Hono, Django, Laravel, and dozens of others, making it suitable for both small utilities and large microservice ecosystems.
With Watch Mode, Scalar watches your OpenAPI source and refreshes the UI whenever the spec changes, eliminating manual rebuilds. Built‑in support for environment variables, request collections, and an integrated playground lets teams experiment with API calls directly from the docs. For teams that prefer a hosted solution, Scalar offers free edge‑hosted documentation with SSL and a custom subdomain, while paid plans add collaboration, custom domains, and rich text documentation. The platform is extensible via plugins and integrates seamlessly into CI pipelines through the Scalar CLI.
When teams consider Scalar, these hosted platforms usually appear on the same shortlist.
Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.
Generate live API docs from a FastAPI project
Developers push changes; Scalar’s watch mode updates the reference instantly, keeping docs in sync with code.
Create a shared, hosted API portal for external partners
Publish the reference on scalar.com, get a secure subdomain with SSL, and grant partner access without managing infrastructure.
Build a collection of reusable request snippets
Save, organize, and export requests across environments, streamlining testing and onboarding for new developers.
Integrate API playground into a React app
Embed the Scalar component via CDN, providing interactive request execution directly within the application UI.
Yes, Scalar renders documentation from a valid OpenAPI/Swagger JSON or YAML file.
Yes, the client is a single HTML/JS bundle that can be served from any static host.
Scalar includes integrations for dozens of frameworks such as FastAPI, Express, Hono, Django, Laravel, NestJS, and more.
Scalar offers free managed hosting with SSL and a *.apidocumentation.com subdomain; paid plans add collaboration and custom domain features.
Watch Mode monitors your OpenAPI file or server endpoint and automatically refreshes the UI whenever changes are detected.
Project at a glance
ActiveLast synced 4 days ago