HTTPS or localhost is required for WebAuthn.
Browser API for passkeys and platform authenticators.
May represent fingerprint, face, PIN or device unlock.
Top-level page access is needed for the availability check.
Checking compatibility...
Fingerprint Sensor Test Online
Use this fingerprint sensor test to check whether your browser can access a secure, user-verifying platform authenticator on your phone, tablet or computer. The tool checks the HTTPS connection, WebAuthn browser support, page context and the availability of a built-in verification method. It can then open an optional system verification prompt on a compatible device.
The result is useful when a fingerprint login, biometric unlock or passkey prompt is not working. It gives you a clear readiness score, device details and a diagnostic report without asking you to upload a fingerprint image.
What this fingerprint test can and cannot detect
A website cannot read your fingerprint pattern, fingerprint image or biometric template. The browser only reports whether a user-verifying platform authenticator is available. Depending on the device, the system may verify you with a fingerprint, face scan, PIN, password or screen lock. Therefore, a successful result confirms platform verification support but does not prove that a fingerprint sensor was the exact method used.
How to Test Fingerprint Sensor Support
- Open this page directly in an up-to-date browser on an HTTPS connection.
- Select Run Compatibility Check and review the four requirement cards.
- If the score reaches 100%, select Start System Verification.
- Complete the prompt shown by your operating system. It may request fingerprint, face, PIN or device unlock.
- Use Copy Report or Download Report if you need the diagnostic results for troubleshooting.
Understanding Your Fingerprint Test Results
Secure Page
WebAuthn needs HTTPS or a local development address. A normal file preview is not a valid secure origin.
WebAuthn API
This confirms that the browser provides the standards-based credential API used by passkeys and authenticators.
Platform Authenticator
This indicates that the device reports a built-in user-verification method such as fingerprint, face or device unlock.
Page Context
The availability check works best on the main page. Embedded, sandboxed or restricted frames may block it.
Why Is My Fingerprint Sensor Not Working?
If this online fingerprint checker reports that the device is not ready, try these common fixes:
- Open the published HTTPS page instead of a downloaded HTML file or editor preview.
- Update Chrome, Edge, Firefox or Safari to the latest version available for your device.
- Set up fingerprint, face recognition, Windows Hello, Touch ID or a secure screen lock in device settings.
- Remove private browsing restrictions and allow the browser to display system credential prompts.
- Open the tool as a full page rather than inside an iframe, app preview or heavily restricted in-app browser.
- Clean the physical fingerprint sensor and re-enrol your fingerprint if device unlock also fails outside the browser.
- Restart the browser or device after changing biometric and security settings.
Important note about system verification
The optional verification button makes a WebAuthn credential request for this website. Your browser or operating system controls the prompt. It may create a non-discoverable test credential scoped to this site, but the page does not receive your fingerprint or biometric template. You can use the compatibility-only check without starting the prompt.
Fingerprint Test, Biometric Test and WebAuthn Test
These terms are related but not identical. A physical fingerprint sensor test performed by the operating system may check the hardware directly. A browser-based biometric test works through WebAuthn and can only request user verification through the secure system interface. A WebAuthn test checks the browser and authenticator path used for passkeys and secure sign-in. This tool focuses on the browser-based path because ordinary websites are intentionally prevented from accessing raw biometric data.
For a complete hardware diagnosis, also test fingerprint unlock in your phone or computer settings. If device unlock works but the online test does not, the issue is more likely related to HTTPS, browser support, page embedding or permissions than to the sensor itself.
Privacy and Security
Your fingerprint image never appears in this tool because browsers do not expose it to websites. Matching happens inside the device authenticator or secure operating-system environment. The page receives only the result of the standards-based credential operation. The report contains compatibility and browser details, so review it before sharing it publicly.
Frequently Asked Questions
Can I test my fingerprint sensor online?
You can test browser compatibility with a platform authenticator online. The site cannot directly scan or inspect your fingerprint hardware, but it can check whether the browser reports a secure user-verification method.
Does this tool collect my fingerprint?
No. It cannot access your fingerprint image or biometric template. Verification remains under the control of your device and operating system.
Why does the result say platform authenticator instead of fingerprint?
WebAuthn does not reveal the exact verification method. A platform authenticator may use fingerprint, face, PIN, password or another device-unlock method.
Why does the test fail in a local HTML preview?
WebAuthn requires a secure context. Publish the tool on an HTTPS page or use localhost for development; a file URL is not treated as the required secure website origin.
Which browsers support the fingerprint compatibility check?
Current versions of major browsers commonly support WebAuthn, but the final result depends on the operating system, device configuration, security policy and page context.
Why is the Start System Verification button disabled?
The button activates only after HTTPS, WebAuthn, top-level page access and a user-verifying platform authenticator have all been confirmed.
Will the system prompt always ask for my fingerprint?
No. The operating system chooses an allowed method and may ask for fingerprint, face recognition, PIN, password or device unlock.
Can this test fix a broken fingerprint sensor?
No. It provides browser and platform-authenticator diagnostics. If fingerprint unlock also fails in device settings, use the manufacturer's hardware diagnostics or support service.
What does a 100% readiness score mean?
It means the secure page, WebAuthn API, top-level context and platform authenticator checks all passed. It does not identify the exact biometric method or certify the physical sensor.
Is it safe to download the diagnostic report?
The report is created locally from the displayed results. It does not contain a fingerprint, but it can contain browser, operating-system and page-origin details, so inspect it before sharing.