Detect FingerprintJS
FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them.
01
Websites using FingerprintJS
23 hostnames in the PluginView corpus for this technology.
| Hostname | Last seen |
|---|---|
| similarweb.com | 8/6/2026 |
| sendinblue.com | 8/6/2026 |
| interactivebrokers.com | 8/3/2026 |
| brevo.com | 8/3/2026 |
| oppo.com | 8/3/2026 |
02
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known FingerprintJS signature at the time of the scan.
- Does not establish
- A sitewide install of FingerprintJS, an active vendor contract, exclusive use, or that FingerprintJS is still in place today.
03
How to check a site for FingerprintJS
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest FingerprintJS signals.
- 2. PluginView reads only public responses and scores them against proprietary FingerprintJS fingerprints. Rule bodies and identifiers are not published.
- 3. Review the confidence score and text explanation for FingerprintJS on the results page.
04
FAQ: detecting FingerprintJS
- Can PluginView detect FingerprintJS without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for FingerprintJS. It does not bypass authentication or paywalls.
- What category is FingerprintJS?
- FingerprintJS is classified under JavaScript libraries, Browser fingerprinting in the PluginView directory.
- Does PluginView publish FingerprintJS fingerprint rules?
- No. Detection uses proprietary fingerprint rules that are not published. Scan results explain matches in plain language without disclosing rule bodies or identifiers.
