HENNGE OTP Generator is a virtual device application for multi-factor authentication (MFA), so-called two-step verification, which generates time-based one-time passwords (OTP) complying with RFC 6238 (TOTP: Time-Based One-Time Password Algorithm).

HENNGE OTP Generator supports multiple authentication source. You may use QR codes, or URLs copied onto the clipboard to add authentication config.

Tested for various platforms
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We tested TOTP QR codes from, and believe it works with:
- Amazon Web Services (AWS Multi-Factor Authentication)
- App.net (Two-Factor Authentication)
- Dropbox (Two-step verification)
- Evernote (Two-step verification)
- Facebook (Login Approvals)
- Gandi (Two-factor Authentication)
- GitHub (Two-factor Authentication)
- Google Accounts (2-step verification)
- Google Apps for Business (2-step verification)
- HENNGE One (HENNGE Access Control OTP verification)
- Microsoft Accounts (Two-Step Verification)
- Tumblr (Two-Factor Authentication)
- WordPress (Two-Step Authentication)
- Yahoo! JAPAN (Yahoo! JAPAN one time password)

Additional security
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HENNGE OTP Generator supports FaceID, TouchID or your phones passcode to prevent strangers or children from casually accessing your OTPs, even when you are physically away from your phone.

Limitations
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- To make OTP work, make sure your clock is in sync
- Only supports 6-digits