fingerprintjs/fingerprintjs
The most advanced free and open-source browser fingerprinting library observed · 2026-10-14
Health v2 · maintenance only
94/100
- Activity 98
- Release rhythm 86
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 41
- age_days: 4269
- days_rel: 13
- days_push: 13
- n_releases_24m: 8
Adoption not part of the score
28571 stars · 2628 forks observed · 2026-10-14
What it is AI-extracted, prompt v1, taxonomy v1, 2026-10-05, confidence 0.97
FingerprintJS is a client‑side JavaScript library that gathers browser attributes and creates a stable hashed identifier for each visitor. It works in regular, incognito and even after local storage is cleared.
Use cases
- Identify unique visitors across sessions for fraud detection
- Prevent account takeover by recognizing returning devices
- Enforce paywall or subscription limits per device
- Detect bots and automated traffic on web pages
- Personalize user experience based on a persistent visitor ID
When to choose
- You need a high‑accuracy, privacy‑preserving way to identify browsers without cookies
- Your application must work in incognito mode or when storage is cleared
- You want a ready‑made solution that integrates with popular frameworks (React, Angular, Vue, etc.)
- You need server‑side verification via Fingerprint’s API or webhooks
When to avoid
- Your project requires a pure server‑side fingerprinting approach
- You must comply with strict policies that forbid any form of device fingerprinting (e.g., certain analytics platforms)
- You need a solution that works offline without contacting Fingerprint’s backend services
Facets
library · maturity active
auth security security web-development browser fingerprinting visitor-id smart-signals fraud-prevention privacy-friendly identification fraud-detection nodejs web
10 sources
- readme: https://github.com/fingerprintjs/fingerprintjs · fetched 2026-10-14 · 878ec99ed996
- homepage: https://fingerprint.com/github/ · fetched 2026-09-21 · 5aa67db0f195
- site_page: https://docs.fingerprint.com · fetched 2026-09-21 · c7f7187a3177
- site_page: https://docs.fingerprint.com/docs/fingerprintjs-pro-google-tag-manager · fetched 2026-09-21 · 366b7239a936
- site_page: https://docs.fingerprint.com/docs/react · fetched 2026-09-21 · 01c738dd6711
- site_page: https://docs.fingerprint.com/docs/fingerprintjs-pro-and-chrome-extension · fetched 2026-09-21 · 7b71123933c7
- site_page: https://docs.fingerprint.com/docs/angular · fetched 2026-09-21 · ba77c9cc98d9
- site_page: https://docs.fingerprint.com/docs/flutter · fetched 2026-09-21 · b8e7537ec815
- site_page: https://fingerprint.com/pricing · fetched 2026-09-21 · 67f684937b7c
- site_page: https://fingerprint.com/integrations · fetched 2026-09-21 · b28d069342be
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| fingerprintjs/fingerprintjs | main | 94 |
For agents
markdown · JSON · MCP: product_card(name="fingerprintjs/fingerprintjs")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem