Zip files 4 times faster than 7-Zip with a demo written in JavaScript
Link to the demo: https://gildas-lormeau.github.io/zip.js/demos/demo-create-file.html To take advantage of this performance gain, you need to add at least 4 files to the zip file and use a Chromium-based browser as the library uses the recent CompressionStream API [1] which allows native file compression. [1] https://developer.mozilla.org/en-US/docs/Web/API/CompressionStream
In plain words
Zip.js is a JavaScript library that compresses files into zip archives up to four times faster than 7-Zip when processing multiple files in Chromium-based browsers. It leverages the native CompressionStream API for improved performance. Intended for developers building web applications that need efficient file compression, the library performs best when compressing at least four files simultaneously and requires a Chromium browser to achieve its speed advantages.
written from the facts on this page · September 2026
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