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A Fast Anonymous Browser Fingerprinting JS Library

Posted · Category: MIT License, Tools

Fingerprinting is a technique, outlined in the research by Electronic Frontier Foundation, of anonymously identifying a web browser with accuracy of up to 94%.

A browser is queried for its agent string, screen color depth, language, installed plugins with supported mime types, timezone offset and other capabilities, such as local storage and session storage. Then these values are passed through a hashing function to produce a fingerprint that gives weak guarantees of uniqueness. No cookies are stored to identify a browser.

FingerprintJS is a fast browser fingerprint library. Written in pure JavaScript, no dependencies. By default uses Murmur hashing and returns a 32bit integer number. Hashing function can be easily replaced. Feather weight: only 1.2 KB when gzipped.

fingerprint-js

Requirements: JavaScript Framework
Demo: http://valve.github.io/fingerprintjs/
License: MIT License

1 Comment
  • bwente

    Too bad it does work with mobile devices.

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