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1. fingerprintjs fingerprintjs Public

   The most advanced free and open-source browser fingerprinting library

   TypeScript 27k 2.5k

2. BotD BotD Public

   Free bot detection library that runs in the browser. Detects automation tools and frameworks. No server required, runs 100% on the client. MIT license, no usage restrictions.

   TypeScript 1.4k 100

3. fingerprintjs-android fingerprintjs-android Public

   Free library for identifying and fingerprinting Android devices. MIT license, no restrictions on usage in production.

   Kotlin 699 116

4. fingerprintjs-ios fingerprintjs-ios Public

   Free iOS library for device fingerprinting. Does not require server APIs to work, fully client-side operation. MIT license, no restrictions on usage in production.

   Swift 137 33

5. react react Public

   Fingerprint SDK for React Single Page Applications (SPA)

   TypeScript 67 15

6. fingerprintjs-pro-android fingerprintjs-pro-android Public

   Official Android agent & SDK for 100% accurate device identification, created for the Fingerprint Pro identification API.

   51 19