Package

is-wsl

Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)

v3.1.1, 15 Feb 2026MITESM onlyTypes: BundledCLI tools and terminal utilities

$ npm install is-wsl

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 101.3m; +100% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 1; Direct, from package.json
Last release: 7 months ago; v3.1.1
GitHub stars: 199; 9 forks
Open issues / PRs: 0 / 0
Contributors: 7
Commits, last 52 weeks: 4

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

101,341,330 downloads last week, 482,047,338 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.

Maintenance

Releases, last 12 months: 19 in total
Latest version: 3.1.1, 15 Feb 20267 months ago
First published: 16 Apr 2017
Last push to GitHub: 18 Sept 20266 days before the snapshot
Repository archived: No
Open issues: 0
Open pull requests: 0
Commits, last 52 weeks: 4
Dependents on npm: 2,038

Major versions

v3 first release 3.0.0, 8 Aug 2023
v2 first release 2.0.0, 23 Apr 2019
v1 first release 1.0.0, 16 Apr 2017

Recent releases

Version	Published
3.1.1	15 Feb 2026
3.1.0	25 Sept 2023
3.0.0	8 Aug 2023
2.2.0	3 May 2020
2.1.1	23 Sept 2019
2.1.0	23 Jun 2019
2.0.0	23 Apr 2019
1.1.0	17 Apr 2017
1.0.0	16 Apr 2017

Compatibility

Module format: ESM onlyFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: >=16
Runtimes: -
Unpacked size (npm): 3.6 kB
Dependencies (1): is-inside-container

Install

npm install is-wsl

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/is-wsl@3.1.1/
unpkghttps://unpkg.com/is-wsl@3.1.1/
esm.shhttps://esm.sh/is-wsl@3.1.1

Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Indexed.