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API Extractor icon

API Extractor

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API Extractor helps you write better TypeScript libraries: It analyzes your exported type signatures and (1) produces an API documentation website, (2) generates a .d.ts "rollup" file, and (3) creates an API report to facilitate PR reviews.

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  • Free • Open Source

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  • Mac
  • Windows
  • Linux
  • Self-Hosted
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  • Developed by

    Unknown

  • Licensing

    Open Source and Free product.

  • Written in

  • Alternatives

    6 alternatives listed

  • Supported Languages

    • English

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  •  6,163 Stars
  •  623 Forks
  •  943 Open Issues
  •   Updated May 15, 2025 
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API Extractor was added to AlternativeTo by octogonz on Apr 18, 2019 and this page was last updated Sep 12, 2020.
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What is API Extractor?

API Extractor helps TypeScript developers manage the API surface for their library. It is distributed as an NPM package "@microsoft/api-extractor". It produces three different output types:

  • API Report - API Extractor can trace all exports from your project’s main entry point and generate a report to be used as the basis for an API review workflow.

  • .d.ts Rollups - Similar to how Webpack can “roll up” all your JavaScript files into a single bundle for distribution, API Extractor can roll up your TypeScript declarations into a single .d.ts file. This file can be trimmed to exclude declarations marked using TSDoc tags such as @beta" or @internal.

  • API Documentation - The tool generates a “doc model” JSON file for each of your projects. This JSON file contains the extracted type signatures and doc comments. The "api-documenter" companion tool can use these files to generate an API reference website, or you can use them as inputs for a custom documentation pipeline.

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