About ClientJS
ClientJS is a JavaScript library for generating browser fingerprints, exposing all the browser data-points.
How many people use ClientJS
GitHub · npm- #1
FingerprintJS28k - #2ClientJS2.2k
#2 of 2 Browser fingerprinting we have counts for (of 5) · bars are GitHub stars across these neighbours; the category leader is FingerprintJS at 28k · as of September 7, 2026
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ClientJS#2 of 2 Browser fingerprinting
FingerprintJS#1 of 2 Browser fingerprinting
Audit any site that runs ClientJS.
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How we audit ClientJS
We measure the detected version against ClientJS's release history and grade the surrounding stack with a Lighthouse-grade quality audit. Weak or outdated links weigh more - one risky dependency can pull the whole score down.
How the score worksMore technologies in Browser fingerprinting
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