# Jampack

Post-build optimizer that compresses and optimizes the static output of a site generator, with image, CSS, JavaScript and HTML passes.


Source: https://findsoftware.frbit.cloud/jampack/
Last reviewed: 2026-10-28
Listed since: 2026-10-28

## Record

### Links

- home: https://jampack.divriots.com/
- repository: https://github.com/divriots/jampack
- docs: https://jampack.divriots.com/installation/
- discord: https://discord.gg/XkQxSU9

### Identity

- status: active
- maintainer: DIV-RIOTS SAS
- maintainerType: company
- parent: unknown
- firstRelease: 2020
- hqCountry: FR

### Kind

- category: build-tool
- hosting: not applicable
- language: javascript
- runtime: node
- runtimeMin: node 14
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: local
- renderingModes: not applicable
- installMethod: npm install -D @divriots/jampack

### License

- licenseModel: open-source
- license: MIT

### Releases

- currentMajor: 0
- latestReleaseDate: 2026-10-04

### Adoption

- githubStargazers: 1695
- packagistDownloads: not applicable
- npmWeeklyDownloads: 3255
- contributors: 17
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- urls: https://jampack.divriots.com/ (read 2026-10-28)
- urls: https://api.github.com/repos/divriots/jampack (read 2026-10-28)
- urls: https://jampack.divriots.com/installation/ (read 2026-10-28)
- maintainer: https://divriots.com/legal/code.to.design/terms/ (read 2026-10-28)
- hqCountry: https://divriots.com/legal/code.to.design/privacy/ (read 2026-10-28)
- language: https://api.github.com/repos/divriots/jampack (read 2026-10-28)
- category: https://jampack.divriots.com/ (read 2026-10-28)
- runtime: https://registry.npmjs.org/@divriots%2fjampack/latest (read 2026-10-28)
- runtimeMin: https://registry.npmjs.org/@divriots%2fjampack/latest (read 2026-10-28)
- installMethod: https://jampack.divriots.com/installation/ (read 2026-10-28)
- runsAs: https://jampack.divriots.com/installation/ (read 2026-10-28)
- license: https://api.github.com/repos/divriots/jampack (read 2026-10-28)
- licenseModel: https://github.com/divriots/jampack/blob/main/README.md (read 2026-10-28)
- firstRelease: https://registry.npmjs.org/@divriots%2fjampack (read 2026-10-28)
- currentMajor: https://registry.npmjs.org/@divriots%2fjampack/latest (read 2026-10-28)
- latestReleaseDate: https://registry.npmjs.org/@divriots%2fjampack (read 2026-10-28)
- githubStargazers: https://api.github.com/repos/divriots/jampack (read 2026-10-28)
- contributors: https://api.github.com/repos/divriots/jampack/contributors (read 2026-10-28)
- npmWeeklyDownloads: https://api.npmjs.org/downloads/range/2026-09-28:2026-10-04/@divriots/jampack (read 2026-10-28)

## Notes

Jampack is a post-processing tool for the output of a static site generator. It runs after the generator has written the site, optimizes the images in that output folder, and compresses the HTML, CSS, JavaScript, SVG and image files in a second pass. The project describes itself as neither a bundler nor a framework.

Projects install it from npm as a development dependency and call it from their build script after the generator, so every build of the site passes through it. For images it produces responsive srcset variants and lazy loading. It inlines critical CSS and prefetches the links on a page, so later navigations are faster.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0