I have been seeing passkeys more often in modern applications, and now they are becoming a serious alternative to traditional passwords.

WebAuthn Level 3 became a W3C Recommendation on 25 August 2026, giving developers a stable standard for public-key based authentication.

The basic flow is:

User
 ↓
Browser
 ↓
Passkey
 ↓
Fingerprint / Face / Device PIN
 ↓
Login

The main difference is that the website does not need to store the user's password.

With WebAuthn, the browser and authenticator use public-key cryptography. The private key stays with the user's authenticator, while the server stores the corresponding public key.

For a web application, this can make login easier for users and removes many traditional password problems.

A simple JavaScript application can use browser WebAuthn APIs, while the backend stores and verifies the credential data.

I think passkeys are especially interesting for:

• SaaS applications
• Admin panels
• Banking applications
• Mobile applications
• Enterprise login systems

The adoption is also growing. FIDO Alliance reported in 2026 that billions of passkeys were already in active use globally.

For new applications, I would seriously consider supporting:

Password Login
      +
Passkey Login
      +
Recovery Option

Passkeys are not just a future idea anymore. The underlying WebAuthn standard is now stable, so this is something developers can start considering for real projects.