2FA Code Generator

2FACode processes the secret in this browser tab and does not send it to a generation API or secret storage system. Page analytics may measure visits but are not used as a TOTP backend. No web tool can protect a secret from a compromised device, malicious browser extension, or a look-alike domain. Use a trusted device, confirm the domain, clear the workspace when finished, and prefer a dedicated authenticator or encrypted vault for long-term storage.

No. The generator does not put 2FA secrets or codes in LocalStorage, SessionStorage, IndexedDB, cookies, URLs, or a server database. Active entries exist only in page memory and disappear when you clear the workspace, close the tab, or reload the page. The separate theme preference may be stored locally, but it never contains authentication data.

Yes. The bulk 2FA generator accepts up to 50 non-empty lines in one batch. Paste a Base32 secret on each line, use “Label | SECRET” to keep accounts recognizable, or paste standard otpauth TOTP URIs. Each valid entry receives its own live code and countdown, while an invalid line gets a line-specific error without exposing the submitted secret.

A TOTP generator creates a time-based one-time password from a shared secret and the current time. Under RFC 6238, the authenticator and the service independently perform the same HMAC calculation for the same time window, so they produce a matching 2FA code without contacting each other. Most services use six digits, SHA-1, and a 30-second period, although an otpauth URI can specify supported alternatives.

The service you are protecting shows the secret when you first enable an authenticator app. Look for wording such as “enter setup key manually,” “can’t scan the QR code,” or “show secret.” It is usually a Base32 string. If setup is already complete and the service no longer shows the secret, use its recovery flow or a saved backup; this 2FA code generator cannot recover a missing key.

Yes. The current 2FA code generator is free to use, requires no account, and has no paid generation limit. The 50-line cap keeps the interface responsive and makes accidental oversized pastes easier to catch. There are no display ads or affiliate scripts in the generator.

No app or extension is required for this temporary browser workflow. A modern browser with HTTPS and Web Crypto support is enough. For daily use or permanent storage, a reputable authenticator app, hardware-backed solution, or encrypted password manager may provide stronger isolation and recovery options than repeatedly entering a secret on a website.

The short lifetime is part of TOTP’s design. Time is divided into fixed periods—commonly 30 seconds—and each period produces a different 2FA code. A service may allow a small neighboring window for clock drift, but an old code quickly stops working. The circular timer beside every result shows how much of the current period remains.

First set your device clock and time zone to automatic, then wait for a fresh 2FA code and try again. Confirm that the Base32 secret belongs to the exact account, that no character was lost during copying, and that an imported URI uses the expected algorithm, digit count, and period. If a previously working secret suddenly fails, use the provider’s recovery or support process rather than repeatedly guessing codes.

It works with services that provide a standards-based TOTP secret or otpauth TOTP URI. Many Google, Microsoft, GitHub, Facebook, Discord, Amazon, and other account setups use that standard, but each company can offer additional 2FA methods or recovery rules. 2FACode is independent and is not endorsed by or affiliated with those services.