Fingerprint DocsFngerprint logo (light)

Welcome to Fingerprint Docs

Fingerprint helps teams prevent fraud, improve user experiences, and better understand their traffic.

Get started
 
 
 
 
 
      __...--~~~~~-._   _.-~~~~~--...__
    //               `Y` _.-~~~~--...__\\
   //   Fingerprint   |  _.-~~~~~--...__\\
  //       Docs       |  _.-~~~~~~--...__\\
 //                   | /_.~~~~----.....__\\
 \_--_--___---_--_--\\|//--_--__-___----_--/
  \==================\U/==================/
                    `---`

Smart Signals

Device intelligence to detect bots, VPN usage, and more.

BotsVPNGeolocationmore...

Identification

Identify every web and mobile visitor with industry-leading accuracy.

BrowsersMobile devices

Start by framework

Use Fingerprint with your favorite frameworks for web and mobile.

View all frameworks
JavaScriptNext.jsReactSvelteVue.jsAngularPreact
AndroidiOS

Start by use case

Explore guides for use cases like payment fraud and account sharing prevention.

View all use case tutorials

Protect your users

Card testing

Reduce fraud. Increase real payments.

Credential stuffing

Stop automated logins using stolen credentials.

Loan fraud

Identify risky devices during loan applications.

Grow your revenue

Coupon abuse

Prevent repeated or automated coupon redemption.

Account sharing prevention

Stop multiple users accessing one paid account.

Paywall enforcement

Block free access to premium content.

New account fraud

Block repeat signups and trial abuse.

Regional pricing

Stop users exploiting cheaper regional prices.

Survey fraud

Prevent survey fraud and abuse.

SMS pumping

Prevent automated SMS abuse that drives carrier costs.

Protect your platform

Web scraping

Block automated scraping of site content or data.

Ban enforcement

Prevent banned users from returning.

Chargeback dispute

Provide device evidence to challenge fraud claims.

API reference

Explore our server and management APIs or learn everything there is to know about JavaScript agent.

View API references
Docs — JavaScript agent
1 const fpPromise = import('https://fpjscdn.net/v4/...')
2 .then(Fingerprint => Fingerprint.start());
3 
4 fpPromise
5 .then(fp => fp.get())
6 .then(result => console.log(result.eventId, result.visitorId));
  • Identify visitors in the browser with high accuracy
  • TypeScript support and easy integration
  • Works with your frontend: React, Vue.js, Svelte, Angular, and more

Additional resources

Stuck? Reach out to our support team or join the official Discord community.

Contact support

Get expert help from support engineers.

Discord server

Get help in the #ask-ai channel.

Changelog

See what we have shipped.