Open Two-Factor Authenticator

Name: Open Two-Factor Authenticator
Rating: 3 (11 reviews)
Author: InBasic

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

As of May 2026, Open Two-Factor Authenticator has 10,000 users and a 3.00/5 rating from 11 reviews in the Workflow & Planning category.

InBasic Workflow & Planning★ Featured

Chrome Web Store ↗.crx

Users0%

10.0K

10,000

Rating0%

3.00

11 reviews

Reviews0%

Version

0.3.3

Manifest V3

History

1 snapshots

Tracking since Apr 24, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 24, 2026	10.0K	3.00	11	0.3.3
Now	10.0K	3.00	11	0.3.3

Permissions & access

Permissions: storagenotifications
Host access: None declared

Screenshots

Open Two-Factor Authenticator screenshot 1

Open Two-Factor Authenticator screenshot 2

Open Two-Factor Authenticator screenshot 3

Open Two-Factor Authenticator screenshot 4

About

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