Package
csso
CSS minifier with structural optimisations
Key numbers
As of 25 Sept 2026
- Weekly downloads
- 25.9m
- +51% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 1
- Direct, from package.json
- Last release
- 4 years ago
- v5.0.5
- GitHub stars
- 3.8k
- 189 forks
- Open issues / PRs
- 95 / 8
- Contributors
- -
- Commits, last 52 weeks
- 0
Downloads
Last week 2026-09-15 to 2026-09-21
25,874,464 downloads last week, 116,880,189 in the last month. The 12-month change of +51% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 082 in total
- Latest version
- 5.0.5, 10 Aug 20224 years ago
- First published
- 31 Aug 2011
- Last push to GitHub
- 21 Jun 2024825 days before the snapshot
- Repository archived
- No
- Open issues
- 95
- Open pull requests
- 8
- Commits, last 52 weeks
- 0
- Dependents on npm
- 836
Major versions
- v5 first release 5.0.0, 4 Dec 2021
- v4 first release 4.0.0, 21 Oct 2019
- v3 first release 3.0.0, 13 Mar 2017
- v2 first release 2.0.0, 6 Apr 2016
- v1 first release 1.2.0, 31 Aug 2011
Recent releases
| Version | Published |
|---|---|
| 5.0.5 | 10 Aug 2022 |
| 5.0.4 | 14 Jul 2022 |
| 5.0.3 | 9 Mar 2022 |
| 5.0.2 | 17 Dec 2021 |
| 5.0.1 | 15 Dec 2021 |
| 5.0.0 | 4 Dec 2021 |
| 4.2.0 | 26 Nov 2020 |
| 4.1.1 | 15 Nov 2020 |
| 4.1.0 | 27 Oct 2020 |
| 4.0.3 | 24 Mar 2020 |
| 4.0.2 | 28 Oct 2019 |
| 4.0.1 | 22 Oct 2019 |
| 4.0.0 | 21 Oct 2019 |
| 3.5.1 | 7 Jun 2018 |
- Module format
- ESM + CommonJSFrom package.json type, main and exports fields
- TypeScript types
- None
- Node.js engine range
- ^10 || ^12.20.0 || ^14.13.0 || >=15.0.0
- Runtimes
- -
- Unpacked size (npm)
- 591 kB
- Dependencies (1)
css-tree
npm install csso- jsDelivr
https://cdn.jsdelivr.net/npm/csso@5.0.5/ - unpkg
https://unpkg.com/csso@5.0.5/ - esm.sh
https://esm.sh/csso@5.0.5
| Package | Weekly downloads | Gzip | Last release | Module | Comparison |
|---|---|---|---|---|---|
| cssnano | 16.1m | - | 7 days ago | ESM only | - |
| postcss-discard-empty | 16.2m | - | 7 days ago | ESM only | - |
| postcss-merge-longhand | 16m | - | 7 days ago | ESM only | - |
Indexability: Indexed.