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The simplified usage of fingerprintjs/fingerprintjs2.


What is fp?

fp is a concise web front-end solution to generate an unique 'fingerprint' for each visitor basing on visitor's device and browser. fp is the simplified usage of fingerprintjs/fingerprintjs2. Without complex configuration, fp can provide an optimized fingerprint for user-agents in form of 6 letters hash in a short time.

Quick start

Click here to see how it works!

How to use fp?



$ npm install fp3 --save


$ yarn add fp3

Cite in HTML:

<script type="text/javascript" src=""></script>

Generate fp

This is a demo to generate fp:

<script type="text/javascript">
  ;(async function(){
    alert(await fp);

This will generate a six-letter hash like this (For difficult client this hash is unique):


The first two letters df indicates the fingerprint of the device, such as the PC, phone etc. Ideally, these two letter will not vary while you switch the browser on the same device.

The middle two letters 3k and the last two letters d0 are the fingerprint of the browser. The different is that, the last one could vary with the change of timezone, plugin etc., while the middle one is more stable and will not vary under these stuation. However, the middle part is more likely to be "not unique" when you have a great amount of clients.

In practice, you can use substr() to decompose fp into each part.

  ;(async function(){
    var fp_device = (await fp).substr(0, 2);  //df in df3kd0
    var fp_browser = (await fp).substr(2, 2); //3k in df3kd0
    var fp_unique = (await fp).substr(4);     //d0 in df3kd0

Advanced Usage

Get fp details

<script type="text/javascript" src=""></script>
<script type="text/javascript">
  ;(async function(){
    console.log(await fp_details);


  • jsdelivr:
  • China:


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