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What is jszip?

stuk/jszip — explained in plain English

Analysis updated 2026-06-24

★ 10,348JavaScriptAudience · developerComplexity · 2/5LicenseSetup · easy

In one sentence

A JavaScript library for creating, reading, and editing ZIP archive files in web pages and Node.js apps, with no server required.

Mindmap

mindmap
  root((jszip))
    What it does
      Create ZIP files
      Read ZIP files
      Edit ZIP files
    Environments
      Web browser
      Node.js
    Input types
      Text content
      Binary data
      Base64 encoded
    Audience
      Web developers
      Node.js devs
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Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

What do people build with it?

USE CASE 1

Let users download a collection of files as a single ZIP archive directly from the browser without a backend.

USE CASE 2

Read and extract the contents of a ZIP file uploaded by a user in a web form.

USE CASE 3

Bundle generated reports or exported assets into a ZIP file for download inside a Node.js application.

USE CASE 4

Programmatically build and modify ZIP archives in a CI script or automated workflow.

What is it built with?

JavaScript

How does it compare?

stuk/jszipreact-static/react-staticeasydiffusion/easydiffusion
Stars10,34810,34110,357
LanguageJavaScriptJavaScriptJavaScript
Setup difficultyeasymoderateeasy
Complexity2/53/52/5
Audiencedeveloperdevelopergeneral

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
You can use this freely for any purpose, commercial or personal, under either the MIT license or the GPLv3 license, whichever suits your project.

So what is it?

JSZip is a JavaScript library that lets web applications create, read, and edit ZIP archive files. A ZIP file is a compressed container format that bundles one or more files together into a single download, commonly used for packaging software, documents, or collections of assets. The library is intended for developers building web pages or Node.js applications who need to handle ZIP files in code. The README is sparse and points to external documentation for full details, but the example it provides shows the basic pattern: create a zip object, add files and folders to it, then generate the final archive for download. Input can be text, binary data, or base64-encoded content. JSZip is available under a dual license, meaning you can choose to use it under either the MIT license or the GPLv3 license depending on which fits your project's requirements.

Copy-paste prompts

Prompt 1
Using JSZip, write a JavaScript function that takes an array of {filename, content} objects and triggers a ZIP file download in the browser.
Prompt 2
I'm building a file export feature. Show me how to use JSZip to create a ZIP containing three text files and one binary image, then offer it as a browser download.
Prompt 3
How do I use JSZip to read a ZIP file uploaded via an HTML input element and list all the filenames inside it?
Prompt 4
Write a Node.js script that uses JSZip to unzip a file, modify one of the contained text files, and re-zip everything to a new output file.

Frequently asked questions

What is jszip?

A JavaScript library for creating, reading, and editing ZIP archive files in web pages and Node.js apps, with no server required.

What language is jszip written in?

Mainly JavaScript. The stack also includes JavaScript.

What license does jszip use?

You can use this freely for any purpose, commercial or personal, under either the MIT license or the GPLv3 license, whichever suits your project.

How hard is jszip to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is jszip for?

Mainly developer.

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