# Stuk/jszip

Create, read and edit .zip files with Javascript

Repository: https://github.com/Stuk/jszip
Canonical: https://ross.abutalabs.com/products/jszip
Homepage: https://stuk.github.io/jszip/
Language: JavaScript
License: NOASSERTION
License Family: other
Topics: javascript, zip
Last push: 2025-03-28T04:23:21+00:00

## Health v2 (maintenance only)
Score: 38/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 13, release rhythm 35, longevity 100
- inputs: {"age_days": 6212, "days_push": 523, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 10378, forks 1338 (observed 2026-08-28T04:10:41.837550+00:00)

## What it is
JSZip is a JavaScript library for creating, reading, and editing .zip archive files with a simple promise-based API. It works in both browsers (including legacy IE) and Node.js, supporting base64, blob, and other output types.

## Use cases
- create zip files in the browser
- read and extract zip archives in javascript
- generate a downloadable zip of multiple files
- edit existing zip archives in node.js
- compress files client-side before upload
- unzip files in a web app

## When to choose
- you need zip creation or extraction in JavaScript without native dependencies
- you need broad browser support including older browsers
- you want a simple, well-documented API for zip archives

## When to avoid
- you need formats other than zip such as tar, gzip, or 7z
- you need maximum compression performance for large files in a native environment
- you need streaming processing of very large archives

## Facets
- artifact type: library
- maturity: maintenance
- function: compression, file-system, serialization
- domain: files, web-development, developer-tools
- platform: browser, cross-platform
- tags: zip, archive, deflate, inflate, blob, nodejs, javascript

## Member repositories
- Stuk/jszip (main) score 38

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:41.837550+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:19:05.932939+00:00, confidence not recorded.
  - readme: https://github.com/Stuk/jszip (fetched 2026-08-28T04:10:41.837550+00:00, sha 5eee3659204e)
  - homepage: https://stuk.github.io/jszip/ (fetched 2026-08-29T08:18:36.145726+00:00, sha 999791bafaf7)
  - registry_npm: https://registry.npmjs.org/jszip (fetched 2026-08-29T08:18:36.154518+00:00, sha 72c3ec383536)
- Data as of 2026-08-30T08:39:29.467469+00:00.