class-validator
Decorator-based property validation for classes.
npm says
17,035,268
per week
Every tarball fetch: mirrors, scanners, CI and people.
real installs
high confidence≈ 17M
per week
Mirror spikes and crawlers removed. CI and dependency installs still count, so this is not a head count.
noise under 1% of npm's count, so nearly all of it counts. noise real installs
Why this estimate
With JavaScript on, this lists what the filter found for this package.
Snapshot from the daily build of Nov 6, 2026, last 7 days of npm data. With JavaScript on, this page recomputes it live from the npm API.
How many people use class-validator?
npm counted 17,035,268 downloads of class-validator in the last 7 days. Nobody can count people exactly, npm included: it does not record who downloaded what. After removing mirror spikes and crawlers, about 17M look like real installs. At this scale most of them come from CI, builds and other packages that depend on class-validator, so the number of people behind them is far smaller.
Is class-validator still maintained?
Less clear: the last release is more than six months old. The latest version, 0.15.1, came out on Feb 26, 2026. The last 12 months saw 3 stable releases, typically 47 days apart. It was first published on Apr 18, 2016. npm lists 2 maintainers.
Is class-validator still used?
Downloads with publish spikes removed are up 44% over 3 months and up 175% over 11 months. For scale, the median of the 269 packages we track, which lean towards today's most downloaded, is up 157% over 11 months, so this one is ahead of that. Last week, 100% of downloads above the crawler floor were on major version 0, the latest one; the most used single version was 0.14.4, with 27%. Weekdays get 1.8× the downloads of weekends, which fits people at work, though CI follows the same rhythm. Crawlers account for about 62 downloads a week, roughly 1 per version.
How the estimate works
- Cut the spike every new version gets from mirrors in its first days.
- Subtract the flat floor robots download from every version each week.
- Show what is left as a range, with a confidence level. It still includes CI and dependency installs, so it is not a count of people.