TOTPBOX vs 2FAS Auth
2FAS Auth is a free, open-source authenticator for iPhone and Android. Its browser extension pairs with your phone: the extension asks for a code, you approve on the phone, and the phone sends the code back. TOTPBOX keeps the encrypted vault in the browser itself, so codes fill without reaching for your phone.
Based on 2FAS Auth's public documentation, checked . Vendors change their products, so confirm details in the sources below.
Feature comparison
| Capability | TOTPBOX | 2FAS Auth |
|---|---|---|
| Platforms | Chrome extension for Chromium-based browsers on Windows, macOS, Linux, and ChromeOS. Native apps are planned. | iOS and Android apps, plus a browser extension paired with the phone |
| Where secrets live | AES-256-GCM encrypted vault inside the browser on your computer | On the phone; the extension does not store secrets |
| Backup and sync | Password-encrypted export on every plan. Pro adds end-to-end encrypted sync across up to 5 devices; the server only sees ciphertext. | Optional backup to Google Drive (Android) or iCloud (iOS) |
| Browser autofill | Detects one-time-code fields and fills the matching code | Yes, after you approve each request on the phone |
| Works without the phone | Yes | No; the phone must be nearby and online to approve |
| Source code | Closed source. The architecture and encryption model are documented in the security whitepaper | Open source |
| Price | Free. Pro is $4/month | Free |
Choose TOTPBOX if
- You want codes filled in the browser without picking up your phone each time.
- You want to sign in when your phone is flat, offline, or in another room.
- You want recovery codes stored with the accounts they protect.
Stay with 2FAS Auth if
- You want secrets to live only on your phone, with a phone approval for every browser fill.
- You need codes on your phone today. TOTPBOX's native apps are not out yet.
- You want an open-source authenticator.
Moving from 2FAS Auth to TOTPBOX
TOTPBOX can't read 2FAS backup files (.2fas) yet. Both apps use standard TOTP, so you can add accounts to TOTPBOX one at a time and keep 2FAS on your phone too.
- 1For each account, either re-scan the service's setup QR code (most services let you set up the authenticator again from their security settings) or copy the secret from your 2FAS entry.
- 2In TOTPBOX, choose Add account and scan the QR code, or enter the issuer, name, and secret manually.
- 3Check that both apps show the same code before you rely on TOTPBOX.