What Is a Passkey?
A passkey is a way to sign in without a password. Instead of typing something a user has to remember, their device creates a unique cryptographic key pair for your website or app. The private key never leaves their device (or their synced password manager); your server only stores the public key. To sign in, the user simply confirms with their fingerprint, face, or device PIN.
Passkeys are built on open standards from the FIDO Alliance and the W3C (known as WebAuthn), and they are supported by the major platforms: Apple, Google, and Microsoft devices and browsers can all create and use them.
Why Passkeys Are More Secure Than Passwords
- Phishing-resistant: a passkey only works on the real website it was created for. A fake login page cannot capture it, which matters more now that AI makes phishing pages and emails far more convincing.
- Nothing to steal from your database: your server stores public keys, which are useless to an attacker on their own. A data breach does not leak reusable credentials.
- No password reuse: every passkey is unique to one site, so a breach somewhere else cannot be used to get into your customers' accounts.
Why They Are Better for Customers, Too
Security improvements usually add friction. Passkeys remove it. Signing in becomes a single tap or glance, there is nothing to forget, and password reset emails mostly disappear. For businesses, that typically means fewer "I can't log in" support requests and fewer abandoned sign-ins at checkout or in a client portal.
Does Your Business Need Passkeys?
If your website is purely a brochure with a contact form, you do not need them. Passkeys make sense when customers or staff log in to something:
- eCommerce stores with customer accounts
- Client portals, booking systems, and membership sites
- SaaS products and internal business tools
- Mobile apps with user accounts
For any product handling personal, financial, or health information, passkeys are one of the strongest security upgrades available today.
How to Add Passkeys
- Check your platform first. Many authentication providers and platforms (for example Supabase, Auth0, Clerk, Firebase, and some eCommerce platforms) offer passkey support or plugins. If you use one, it may be a configuration change rather than a build.
- For custom builds, use a proven library. Implementing WebAuthn by hand is error-prone. Mature open-source libraries exist for Node.js, PHP, Python, and other server languages.
- Offer passkeys alongside existing logins first. Let users add a passkey after signing in normally, then make it the default option once adoption grows.
- Plan account recovery. Users can lose devices. Keep a secure fallback, such as email verification combined with a second factor, so nobody gets locked out permanently.
- Explain it simply. A short line like "Sign in with your fingerprint or face, no password needed" drives far more adoption than technical terms.
Common Questions
What if a customer switches phones? Passkeys created with iCloud Keychain, Google Password Manager, or many third-party password managers sync across that user's devices, so they carry over.
Can someone use a passkey on a computer that is not theirs? Yes. They can scan a QR code with their phone to sign in on another device, without the passkey ever being copied to it.
Do we have to remove passwords? No. Most businesses run both side by side during the transition, which is the safest approach.
The Bottom Line
Passkeys are one of the rare upgrades that improve security and customer experience at the same time. If people log in to anything you run, adding passkey support in 2026 is a smart, relatively low-cost step that reduces both support costs and the risk of account takeovers.
Adding Logins to Your Product?
Ovia Tech builds secure client portals, SaaS products, and apps with modern authentication, including passkeys, MFA, and secure account recovery.