divriots/jampack
Optimizes static websites for best user experience and best Core Web Vitals scores. observed · 2026-08-28
Health v2 · maintenance only
70/100
- Activity 85
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 1444
- days_rel: n/a
- days_push: 93
- n_releases_24m: 0
Adoption not part of the score
1696 stars · 29 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Jampack is a post-processing CLI tool that optimizes the output of static site generators for best user experience and Core Web Vitals scores. It generates responsive image sets, compresses images to modern formats, inlines critical CSS, and applies above-the-fold optimizations.
Use cases
- optimize static site images for core web vitals
- generate responsive srcset images from a single source image
- compress jpg and png images to webp and avif in a static site build
- fix CLS by adding missing image width and height attributes
- inline critical CSS to avoid FOUC
- lazy-load below-the-fold images automatically
- optimize CDN-hosted images via srcset URL transforms
- post-process SSG build output like Hugo, Astro, or Vite
When to choose
- You have a static site or Jamstack site and want to improve Lighthouse/Core Web Vitals scores
- You want responsive, compressed images without changing your SSG or templates
- You want critical CSS inlining and above-the-fold prioritization as a build step
When to avoid
- You need a bundler or full web framework - jampack is explicitly neither
- Your site is server-rendered dynamically rather than static output
- You need runtime image optimization rather than build-time post-processing
Facets
cli-tool · maturity active
image-processing developer-tools build-tool cli web-development frontend performance web-design cli cross-platform core-web-vitals jamstack static-site-optimization responsive-images critical-css post-processing cls lazy-loading webp avif nodejs
10 sources
- readme: https://github.com/divriots/jampack · fetched 2026-08-28 · 931ed95d9d27
- homepage: https://jampack.divriots.com/ · fetched 2026-08-29 · 06dbd7ab4d14
- site_page: https://jampack.divriots.com/installation · fetched 2026-08-29 · 431e709b68ca
- site_page: https://jampack.divriots.com/features/optimize-images · fetched 2026-08-29 · 627b8c2784f2
- site_page: https://jampack.divriots.com/features/optimize-images-cdn · fetched 2026-08-29 · fa3c22c186c8
- site_page: https://jampack.divriots.com/features/optimize-images-external · fetched 2026-08-29 · aa2df545dfe9
- site_page: https://jampack.divriots.com/features/optimize-above-the-fold · fetched 2026-08-29 · f4081636b32b
- site_page: https://jampack.divriots.com/features/embed-small-images · fetched 2026-08-29 · 694b1bde2cfd
- site_page: https://jampack.divriots.com/features/images-max-width · fetched 2026-08-29 · c2a8439981ee
- site_page: https://jampack.divriots.com/features/inline-critical-css · fetched 2026-08-29 · 62e1d1b4c8fe
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| divriots/jampack | main | 70 |
For agents
markdown · JSON · MCP: product_card(name="divriots/jampack")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem