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JavaScript 2 Factor Authenticator

Free
Utilities

A single web page that uses local JavaScript to calculate time-based one-time password (TOTP) codes for two-factor authentication, and works offline. It acts as a browser-based alternative to authenticator apps like Google Authenticator for users who want to generate 2FA codes without a phone app or sending secrets to any server.

Catalogued August 3, 2026 · Curated by PWA Directory team
Works Offline
Installable
Cross-Platform
Free

Not sure how to add JavaScript 2 Factor Authenticator to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.

Own JavaScript 2 Factor Authenticator? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.

Tags
totptwo-factor-authenticationsecurityofflineclient-sideauthenticatoropen-sourcepwa

How to install JavaScript 2 Factor Authenticator as a PWA

Chrome / Edge
Menu (⋮) → Add to Home screen
Safari (iOS)
Share (↑) → Add to Home Screen
Firefox
Menu (⋮) → Install

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