OpenAuthenticator review
A focused free desktop TOTP tool for local code generation.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
OpenAuthenticator is a free, open-source desktop authenticator for individual users who want a straightforward way to generate time-based one-time passwords. It runs on Windows, macOS, and Linux, with core tools for adding and deleting authenticator tokens, generating TOTP codes, copying them to the clipboard, and automatically refreshing them. Service favicons provide a small visual aid for distinguishing accounts, while local token storage keeps the app focused on desktop use rather than account synchronization.
Its main strength is a narrow, practical feature set. The Electron-based application provides the essentials for managing TOTP tokens without extending into password management or broader authentication workflows. Cross-platform desktop packaging makes it suitable for users who move between the three supported desktop operating systems, while open-source distribution gives technically minded users a transparent software model. Those priorities make it a reasonable fit for personal accounts where codes are accessed from one desktop environment and a minimal interface matters more than ecosystem breadth.
The trade-off is limited protection and portability for stored tokens. OpenAuthenticator does not provide encryption, backups, or synchronization, so it is a weaker choice for users who need recovery options or access across multiple devices. It also supports TOTP rather than HOTP and does not offer broader platform coverage beyond Windows, macOS, and Linux. Choose it for simple local desktop TOTP generation; choose an alternative if encrypted storage, device syncing, backup workflows, HOTP, or mobile access are requirements.
OpenAuthenticator pros and cons
- Where it wins
- Free open-source desktop software for Windows, macOS, and Linux
- Generates and automatically refreshes TOTP codes
- Copies codes to the clipboard and supports local token storage
- Where it doesn't
- No encryption for stored authenticator data
- No backups or synchronization across devices
- Supports TOTP only, not HOTP or broader platform coverage
OpenAuthenticator fact sheet, pricing and score →
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