2FA Code Generator

A local TOTP generator using Web Crypto. Supports otpauth:// URIs, password-style secrets, and previous/next windows for clock skew.

Developer Tools Encoding & Security Runs locally No sign-up

2FA Code Generator

RFC 6238 · local only

Base32 secret

Case-insensitive. Spaces and trailing padding are ignored. The secret never leaves this tab.

otpauth:// URI (optional)

Extracts the secret, period, digits, and algorithm from a TOTP setup URI.

Period

Digits

Algorithm

------ Waiting for a secret

Clock drift helpers

Previous code: —
Next code: —

Clock drift: TOTP codes depend on your device clock. Previous and next codes cover one period of drift; if codes keep failing, sync your clock.

About 2FA Code Generator

Generate TOTP codes from a Base32 secret with support for SHA-1, SHA-256, SHA-512, and custom periods.

This tool runs locally in your browser. It does not upload your input, require an account, or store your data on a server. If a feature needs a network request, the interface asks before sending anything.