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Generate time-based one-time passwords (TOTP) with QR import, encrypted vault, multiple accounts, backup, and authenticator-style UI.
Generate time-based one-time passwords (TOTP) with QR import, encrypted vault, multiple accounts, backup, and authenticator-style UI.
Nextooly’s TOTP 2FA Generator gives you a full authenticator experience directly in your browser — no app install, no phone required. TOTP stands for Time-Based One-Time Password, defined in RFC 6238.
It is the standard behind Google Authenticator, Authy, and Microsoft Authenticator: every 30 seconds, the app combines your secret key with the current time to produce a unique 6-digit code that expires as soon as the next window begins. This makes TOTP codes far more secure than SMS codes, which can be intercepted via SIM-swapping.
Example
Input: Your chosen settings, seed text, or options for the TOTP 2FA Generator workflow.
Output: A generated result that is ready to copy, save, or download.
If TOTP 2FA Generator is close but not quite the right fit, these related Nextooly tools cover adjacent security & privacy workflows without sending you to another service.
Best if you need to generate strong, random passwords locally in your browser.
Best if you need to compute SHA-256, SHA-1, and MD5 hashes for text and files.
Best if you need to aES-256-GCM secure text encryption and decryption with password-based key derivation.
What is TOTP (Time-Based One-Time Password)?
TOTP is a standard algorithm (RFC 6238) that generates a short, time-sensitive code — usually 6 digits — by combining a shared secret key with the current time. The code changes every 30 seconds and is useless once it expires. It is the technology behind Google Authenticator, Authy, and Microsoft Authenticator.
What is two-factor authentication (2FA)?
Two-factor authentication adds a second verification step when logging in — something you know (your password) plus something you have (a TOTP code). Even if your password is stolen, an attacker cannot access your account without the current 6-digit code.
How is TOTP different from SMS verification codes?
SMS codes are sent over the phone network and can be intercepted through SIM-swapping attacks or SS7 exploits. TOTP codes are generated locally from a secret key and a clock — they never travel over a network, making them significantly more secure.
What websites and apps support TOTP 2FA?
Most major platforms support TOTP: Google, GitHub, Dropbox, Twitter/X, Amazon AWS, Cloudflare, Facebook, Coinbase, Binance, most password managers, and thousands of other services. Look for 'Authenticator app' in the 2FA settings of any site.
Is this a replacement for Google Authenticator?
Yes, for desktop and browser use. If you need to generate TOTP codes on a PC or Mac without a phone, this tool works as a full alternative. For mobile use, Google Authenticator, Authy, or similar apps are still recommended.
What is an otpauth:// QR code?
When you enable 2FA on a website, it typically shows a QR code encoding a URL like otpauth://totp/Example?secret=JBSWY3DPEHPK3PXP&issuer=Example. This tool reads that QR code and sets up the account automatically.
Does this TOTP tool upload my secrets to a server?
No. All secrets are encrypted locally in your browser using AES-256-GCM and stored only in your browser's localStorage. Nothing is ever sent to any server.
Is my vault encrypted?
Yes. Your master password is used to derive a key (PBKDF2-SHA256, 200k iterations) which encrypts the entire vault before it is stored.
What is the 'Panic Password'?
A duress feature. If you are forced to unlock the app under threat, enter this password — it silently wipes all local data and opens an empty vault to protect your real accounts.
CRITICAL: Can I import a backup while in Panic Mode?
NO. If you unlock with the Panic Password, the app assumes you want to destroy data. Always unlock with your Real Master Password before importing a backup.
Can I import a backup that uses a different password?
Yes. Smart Import will prompt you for the backup's original password if it differs from your current master password.
Why are the codes blurred?
To prevent shoulder surfing. Hover over a code to reveal it. Clicking a code copies it and auto-clears your clipboard after 60 seconds.
What happens if I forget my master password?
Your vault cannot be decrypted. There is no recovery method unless you have a backup file and remember its password. Export encrypted backups regularly.
Does it auto-lock?
Yes. The vault locks automatically after 15 minutes of inactivity.
2026-03-10
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