2FA Fast, free online 2FA code generator Free · Private · No Account Required

Instant 2FA Code Generator

Generate 2FA codes online instantly. No app, no account needed. This free 2FA generator computes your TOTP one-time password entirely in your browser. Your secret key never leaves your device.

Generate Code Now How it works

2FA Code Generator

Your key is never sent to any server.

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Re-enroll on a new device? Generate a QR code → Need a new secret key? Generate secret →

Your Browser Only

Saved 2FA Accounts

Quick access to your last 20 2FA accounts, stored locally in your browser, never on our servers.

How It Works

3 Steps to Your 2FA Code

No signup. No install. Works in every modern browser.

1. Enter Secret Key

Paste the Base32 secret key from your account's 2FA setup page. It looks like JBSWY3DPEHPK3PXP.

2. Get 6-Digit Code

Your current TOTP code appears instantly and refreshes every 30 seconds, synced with your account.

3. Copy & Login

Click Copy, paste into the 2FA field on the login page. Done. You're in.

Why 2FA Fast

Built for Speed and Privacy

Instant Generation

Codes appear in under 100ms. No loading screens.

Zero Server Data

Your secrets never touch our servers. Ever.

Shareable URLs

Create a direct link to instantly view any code.

Works Everywhere

Mobile, desktop, any browser, no app needed.

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Get 2FAFast Everywhere

Your 2FA Codes, One Click Away

Install the free 2FAFast browser extension for unlimited accounts, offline access, and QR export/import. Mobile apps for Android & iOS are on the way.

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FAQ

2FA Frequently Asked Questions

Yes. Your secret key is processed entirely in your browser using the Web Crypto API. It is never transmitted to our servers. You can open browser DevTools → Network tab while generating a code; you will see zero outgoing requests.
A 2FA secret key is a Base32-encoded string (e.g. JBSWY3DPEHPK3PXP) shared between your account provider and your authenticator. It is used to compute time-based one-time passwords (TOTP) per RFC 6238.
No. 2FA Fast stores nothing on our servers. The optional Save feature stores your labels and secrets in your browser's localStorage, it never leaves your device and is not shared with us.
TOTP (Time-based One-Time Password) generates a 6-digit code every 30 seconds using your secret key and the current time. Both your authenticator and the website compute the same code, so the server can verify you without the code ever being transmitted over the network.
Yes. 2FA Fast uses the same TOTP algorithm (RFC 6238, HMAC-SHA1) as Google Authenticator, Microsoft Authenticator, Authy, and all standard apps. The generated codes are identical. It is ideal as a backup when your phone is unavailable.
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From the Blog

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Free, private, instant. No sign-up, no install, no data stored.

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