Purr 2FA Authenticator

Sign in on your computer with one tap. Purr brings your 2FA code from your phone or a security key. It never sees your secret.

When a site asks your browser for a two-factor code, Purr gets it from your phone or a security key and fills it in. The secret that makes the code never touches the computer you're signing in on. Requires the free Purr app on your phone (Android & iOS). Pair the two once by scanning a QR code, and you're set. HOW IT WORKS When a login page asks for a 6-digit code, Purr spots the field and asks your phone. You tap Approve there, and the code fills itself in on your computer. Only those six digits ever travel, and only after you approve. Prefer hardware? Register a FIDO2 security key (like a YubiKey) and fill the code with a touch, right on your laptop, while your phone stays in your pocket. Your vault lives in the extension only as ciphertext that a key touch unlocks for a single code. WHY PEOPLE CHOOSE PURR • One tap to sign in on your computer. No hunting through a list, no retyping six digits against the clock. • Or a single touch of your security key. Two separate factors on two separate devices, the way real security is meant to work. • The extension never sees your secret. Codes are generated on your phone; only the final six digits reach the browser, end to end encrypted. • No account, no email, no phone number. Nothing to sign up for. • No ads, no trackers, no analytics. • Free and open source. Read the code or build it yourself. PRIVATE BY DESIGN Purr's relay only ever moves ciphertext between your own devices. It cannot read your accounts or your codes. The extension holds no plaintext secrets. This is not a promise about how we behave with your data. It's an architecture where the data isn't ours to read. Open source under GPL-3.0.