Package
js-yaml
YAML 1.2 parser and serializer
Key numbers
As of 25 Sept 2026
- Weekly downloads
- 222m
- +100% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 1
- Direct, from package.json
- Last release
- 12 days ago
- v5.4.2
- GitHub stars
- 6.6k
- 854 forks
- Open issues / PRs
- 4 / 0
- Contributors
- 85
- Commits, last 52 weeks
- 312
Downloads
Last week 2026-09-15 to 2026-09-21
222,034,894 downloads last week, 1,079,058,383 in the last month. The 12-month change of +100% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 1991 in total
- Latest version
- 5.4.2, 13 Sept 202612 days ago
- First published
- 2 Nov 2011
- Last push to GitHub
- 24 Sept 2026same day as the snapshot
- Repository archived
- No
- Open issues
- 4
- Open pull requests
- 0
- Commits, last 52 weeks
- 312
- Dependents on npm
- 29,169
Major versions
- v5 first release 5.0.0, 20 Jun 2026
- v4 first release 4.0.0, 3 Jan 2021
- v3 first release 3.0.0, 16 Dec 2013
- v2 first release 2.0.0, 9 Feb 2013
- v1 first release 1.0.0, 1 Jul 2012
- v0 first release 0.2.0, 2 Nov 2011
Recent releases
| Version | Published |
|---|---|
| 5.4.2 | 13 Sept 2026 |
| 3.15.2 | 26 Aug 2026 |
| 4.3.2 | 26 Aug 2026 |
| 5.4.1 | 26 Aug 2026 |
| 5.4.0 | 25 Aug 2026 |
| 5.3.0 | 14 Aug 2026 |
| 5.2.3 | 1 Aug 2026 |
| 3.15.1 | 31 Jul 2026 |
| 4.3.1 | 31 Jul 2026 |
| 5.2.2 | 23 Jul 2026 |
| 5.2.1 | 2 Jul 2026 |
| 3.15.0 | 26 Jun 2026 |
| 4.3.0 | 26 Jun 2026 |
| 5.2.0 | 26 Jun 2026 |
- Module format
- ESM + CommonJSFrom package.json type, main and exports fields
- TypeScript types
- Bundled
- Node.js engine range
- Not declared
- Runtimes
- -
- Unpacked size (npm)
- 1.5 MB
- Dependencies (1)
argparse
npm install js-yamlCDN
jsDelivr: 4.4m requests in 30 days
- jsDelivr
https://cdn.jsdelivr.net/npm/js-yaml@5.4.2/ - unpkg
https://unpkg.com/js-yaml@5.4.2/ - esm.sh
https://esm.sh/js-yaml@5.4.2
Indexability: Indexed.