Freedom251 › Authenticator apps
2FA Authenticator
What 2FA Authenticator is
2FA Authenticator is a Chrome extension for generating TOTP and HOTP two-factor authentication codes in a browser. Codes are created on the user’s device and can work offline. The extension is open source under the MIT license, and its site lists reproducible builds. Optional password protection encrypts codes on the device, including backups. The maker says secret keys, account names, and codes do not reach its servers in readable form. Automatic local backups retain seven days of data, while otpauth:// links support account import and export. Chrome Sync can synchronize accounts between computers using the same Google account, within Chrome’s sync capacity. Tools include QR scanning, quick search, account groups, and time-synchronization checks. A share link can provide up to an hour of ready-made codes without exposing a secret key. Setup guides cover GitHub, AWS, Discord, Google, Microsoft 365, and Coinbase. The free plan is available, with a possible account-addition limit on new installations; Pro removes that limit.
Who it suits
It suits Chrome users who need browser-based TOTP or HOTP codes, offline operation, encrypted backups, and optional synchronization across computers. It is also aimed at users who prefer an open-source extension.
What it does well
- Generates TOTP and HOTP codes offline
- Optional on-device password encryption
- Automatic seven-day local backups
- Imports and exports otpauth:// links
- Open source under MIT license
What to know first
- Chrome extension only; no phone version
- Free plan may limit new account additions
- Chrome Sync depends on sync capacity
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Every feature · New installations may have an account limit · Pre-1.14.0 installations keep unlimited accounts | Free |
| Pro | Removes the free account limit | On request |
As authenticator.sh lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
2FA Authenticator combines browser-based code generation with offline operation, local encryption, backups, and account-management tools. Check the new-installation account limit and Chrome-only platform before choosing it.
Facts from 2FA Authenticator's own pages
- Account limit
- The free plan may limit account additions for new installations; existing accounts remain available and Pro removes the limit. · authenticator.sh, 11 Oct 2026
- Backups
- Automatic local backups retain the last seven days. · authenticator.sh, 11 Oct 2026
- Code generation
- Codes are generated on the user's device and can work offline. · authenticator.sh, 11 Oct 2026
- Code type
- totp and hotp · authenticator.sh, 22 Sept 2026
- Encrypted backup
- Yes · authenticator.sh, 22 Sept 2026
- Free plan
- Yes · authenticator.sh, 22 Sept 2026
- Import and export
- Users can import and export accounts as otpauth:// links. · authenticator.sh, 11 Oct 2026
- Integrations
- The maker lists setup guides for services including GitHub, AWS, Discord, Google, Microsoft 365, and Coinbase. · authenticator.sh, 11 Oct 2026
- Multi-device sync
- Yes · authenticator.sh, 22 Sept 2026
- Open source
- The extension is open source under the MIT license, and the site lists reproducible builds. · authenticator.sh, 11 Oct 2026
- Other features
- The extension includes QR scanning, quick search, account groups, and time synchronization checks. · authenticator.sh, 11 Oct 2026
- Password protection
- Users can optionally password-protect codes, which are then encrypted on the device, including backups. · authenticator.sh, 11 Oct 2026
- Platform limitation
- The maker says there is no phone version because Chrome on phones does not run extensions. · authenticator.sh, 11 Oct 2026
- Purpose
- A Chrome authenticator extension that generates two-factor codes in the browser. · authenticator.sh, 11 Oct 2026
- Secret handling
- The maker says secret keys, account names, and codes never reach its servers in readable form. · authenticator.sh, 11 Oct 2026
- Sharing
- A share link can carry up to an hour of ready-made codes without sharing the secret key. · authenticator.sh, 11 Oct 2026
- Support
- The site lists [email protected] and [email protected] for vulnerability reports. · authenticator.sh, 11 Oct 2026
- Supported platforms
- Chrome extension · authenticator.sh, 22 Sept 2026
- Sync
- Accounts can sync across computers using Chrome Sync with the same Google account, subject to Chrome's sync capacity. · authenticator.sh, 11 Oct 2026
Where 2FA Authenticator stands on Freedom251
- Authenticator apps#66 of 111