Passkey Tester & Generator
Test if your browser and device support passkeys (WebAuthn/FIDO2). Check compatibility, create a test passkey, and get a readiness score. Everything runs locally — no server needed.
What Are Passkeys?
Passkeys are a passwordless authentication standard built on WebAuthn/FIDO2 technology. Instead of typing passwords, you authenticate with biometrics (Face ID, Touch ID, fingerprint), a device PIN, or a hardware security key. Passkeys are phishing-resistant, cannot be reused across sites, and eliminate the need to remember passwords. Apple, Google, and Microsoft have made passkeys a default authentication option across their platforms since 2023.
This tool tests whether your current browser and device fully support the passkey standard, including platform authenticator support, conditional UI (autofill), and cross-device authentication.
Why Test Passkey Compatibility?
If you are a developer building passkey authentication, testing across browsers and devices is essential. Not all browsers support every WebAuthn feature — conditional mediation (passkey autofill) requires Chrome 108+, Safari 16+, or Edge 108+. Platform authenticator support varies by OS version. This tool gives you a quick compatibility matrix without writing test code.
For end users, knowing your passkey readiness helps you understand which sites you can use passkeys with and whether you need to update your browser or device for full support.
Passkey Adoption in 2026
As of 2026, over 15 billion accounts support passkey authentication. Major platforms including Google, Apple, Microsoft, Amazon, PayPal, GitHub, and Discord have implemented passkeys. The FIDO Alliance reports that passkey adoption has grown 400% since 2024, driven by improved browser support and OS-level integration. Enterprise adoption is accelerating as organizations move away from passwords to reduce phishing risk and compliance overhead.
How Passkeys Work Technically
Passkeys use public-key cryptography. When you create a passkey, your device generates a unique key pair — the private key stays on your device (protected by biometrics or PIN), while the public key is sent to the website. During authentication, the site sends a challenge, your device signs it with the private key, and the site verifies it with the public key. The private key never leaves your device, making passkeys immune to server breaches and phishing attacks.
Frequently Asked Questions
What does this passkey tester check?
It tests eight key capabilities: WebAuthn API availability, platform authenticator (biometrics/PIN), conditional UI support (passkey autofill), credential management API, secure context (HTTPS), AbortController, ArrayBuffer support, and crypto random generation. Each check contributes to your overall readiness score.
Is creating a test passkey safe?
Yes. The test passkey is created with attestation set to "none" and is only valid for this website origin. It cannot be used on any other site. The credential is temporary and stored only in your browser's credential manager.
Why does my device score less than 10?
Common reasons: using HTTP instead of HTTPS (passkeys require secure context), older browser version without conditional UI support, or missing platform authenticator (e.g., desktop without Windows Hello or biometric sensor).
Which browsers support passkeys best?
Chrome 108+, Safari 16+, and Edge 108+ have the most complete passkey support including conditional UI (autofill). Firefox supports basic WebAuthn but conditional mediation support is still being implemented. All major mobile browsers support passkeys via platform authenticators.
Can I use this tool to test my website's passkey implementation?
This tool tests the client side — whether the user's browser and device support passkeys. For testing your server-side WebAuthn implementation, you would need to test the full registration and authentication flow against your own relying party (server).
What is conditional UI / conditional mediation?
Conditional UI allows passkeys to appear in the browser's autofill dropdown, just like saved passwords. Users see their passkey as an autofill option without clicking a special "Sign in with passkey" button. This is the smoothest user experience and is supported in Chrome 108+, Safari 16+, and Edge 108+.