Product

Overview

Fingerprint.dev is a hosted visitor identification service for products that need durable device evidence without cookies or local storage.

A visitor_id to store with your own events, accounts, reviews, or support tickets when you need to connect repeat activity.

A confidence score to choose whether a match is strong enough for your workflow.

A management dashboard to review identify requests, visitor history, usage, keys, allowed origins, and billing.

Connect repeat attempts across changed accounts and browser state.

Review unfamiliar devices during recovery and sensitive actions.

Dedupe conversions and join landing-page events when cookies drop.

Use the JS SDK when you control the browser. Use the REST API for server-side calls, edge integrations, or custom clients.

import { identify } from "fingerprint.dev";

let result = await identify({
  apiKey: "fp_live_...",
});

Fingerprint.dev is evidence, not authentication. Keep your own account, session, and authorization model in charge.