Open Two-Factor Authenticator

by InBasic · add0n.com · Workflow & Planning

FeaturedEstablished publisherManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

An open-source two-factor Time-based One-Time Password (TOTP) authenticator with SHA-256 secure storage

Users

10K

0 in 30 days

Rating

3.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#9,494

#8,174 among extensions

Version

0.3.3

updated 20 Nov 2024

Users

monthly, 3 years

Latest, 15 Oct 2026: 10,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 11 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Open Two-Factor Authenticator

Open Two-Factor Authenticator aims to provide an open-source two-factor authentication to browsers and Android devices with synced storage. By using this extension, you can have your encrypted keys stored in the browser's synced storage. This allows you to sync them across multiple devices. This extension uses the public key/private key method to encrypt stored data (SHA-256). Currently, Open Two-Factor Authenticator supports Firefox on Desktop, Firefox on Android, Chrome, Edge, and Opera browsers. Standalone Android implantation is still in progress. Features: 1. Stores secrets securely using AES-CBC encryption. 2. Does not store passwords 3. Does not have any server-side activities whatsoever 4. Uses synced storage, so secrets are securely shared between multiple devices. 5. Supports custom number of digits and custom validation period