Compare software

TypeSpecSwagger Editor
Free

Free and open source under the MIT licence.

 Free

Free to use in the browser.

Windows, Web, Command line Web
  • Generates OpenAPI, JSON Schema and Protobuf from one definition
  • Much shorter than equivalent OpenAPI YAML
  • Edit OpenAPI definitions in the browser
  • Send live requests to the described API
  • Another language for the team to learn
  • Generated output still needs review against your API conventions
  • Focused on OpenAPI files rather than ad hoc requests
  • No saved request collections like a full API client
Downloadable app, Web application Web application
Open source Closed source
License: MIT License not stated
No account needed No account needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.