CLI tool for Size Limit

Usage no npm install needed!

<script type="module">
  import sizeLimit from '';


Size Limit CLI Tool

Size Limit logo by Anton Lovchikov

Size Limit is a performance budget tool for JavaScript. It checks every commit on CI, calculates the real cost of your JS for end-users and throws an error if the cost exceeds the limit.

  • ES modules and tree-shaking support.
  • Add Size Limit to Travis CI, Circle CI, GitHub Actions or another CI system to know if a pull request adds a massive dependency.
  • Modular to fit different use cases: big JS applications that use their own bundler or small npm libraries with many files.
  • Can calculate the time it would take a browser to download and execute your JS. Time is a much more accurate and understandable metric compared to the size in bytes.
  • Calculations include all dependencies and polyfills used in your JS.
Size Limit CLI

With GitHub action Size Limit will post bundle size changes as a comment in pull request discussion.

Size Limit comment in pull request about bundle size changes

See full docs on GitHub.