2FA and TOTP tools
Everything you need to generate, check, and encode authenticator secrets — in the browser, with optional cookie-saved accounts on the main generator.
TOTP generator
Live 6-digit 2FA codes from a Base32 secret, with optional device-saved accounts.
TOTP verifier
Check whether a code matches a secret within a clock-drift window.
Base32 encoder
Encode or decode RFC 4648 Base32 used by authenticator apps.
Secret generator
Create a random Base32 TOTP secret for new 2FA enrollments.
otpauth URI builder
Build a standard otpauth://totp URI for authenticator apps.
Online authenticator
How an online TOTP tool compares with Google Authenticator.