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About this tool
Generate secure TOTP two-factor authentication codes in your browser. 100% client-side, works offline, RFC 6238 compatible.
2FA Authenticator is a free security & privacy tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open 2FA Authenticator on AltFTool — it loads instantly in your browser.
Paste your code or data sample into the workspace.
Pick the format, conversion, or analysis you need.
Copy the polished result straight back into your project.
Paste snippets, payloads, or commands straight from your editor and get a tidy, shareable result in one step.
Format, convert, or inspect data before it lands in tests, documentation, or production requests.
Use the generated output as a copy-ready starting point instead of writing everything by hand.
Yes — 2FA Authenticator is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. 2FA Authenticator runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Generate secure TOTP two-factor authentication codes in your browser. 100% client-side, works offline, RFC 6238 compatible. It's built for quick, everyday security & privacy tasks with results you can copy or download straight away.
Yes — 2FA Authenticator works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.
