css/csso
CSS minifier with structural optimizations observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
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: 5678
- days_rel: n/a
- days_push: 803
- n_releases_24m: 0
Adoption not part of the score
3788 stars · 188 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
CSSO is a JavaScript CSS minifier that performs cleaning, compression, and structural restructuring of stylesheets via AST transformations built on CSSTree. It runs in Node.js and browsers and can emit source maps.
Use cases
- minify css files for production
- reduce stylesheet size with structural optimizations
- compress css in a build pipeline
- minify css in the browser
- generate source maps while minifying css
When to choose
- you need aggressive CSS minification with rule merging and restructuring
- you want a programmable AST-based minifier in Node.js or the browser
- you need source map support during minification
When to avoid
- you only need simple whitespace stripping without restructuring
- you need minification for languages other than CSS
- you require a guaranteed stable internal AST API
Facets
library · maturity stable
compression parser developer-tools web-development frontend browser cross-platform css-minifier css-optimization ast-based source-map build-pipeline css nodejs
3 sources
- readme: https://github.com/css/csso · fetched 2026-08-28 · 8c052b54a22a
- homepage: https://css.github.io/csso/csso.html · fetched 2026-08-29 · 3ebba4f1b1c9
- registry_npm: https://registry.npmjs.org/csso · fetched 2026-08-29 · 469636215432
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| css/csso | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem