What Is 2FA And How TOTP Works
Why two-factor authentication matters, how authenticator apps work, and when TOTP is a better choice than SMS.
Open Guide Guides
Guides
This section collects practical reading material that supports the live tools on 2FA Guide Hub.
Featured Reading
TOTP Backup And Recovery
How to protect recovery codes, move to a new phone, and avoid locking yourself out of important accounts.
Open GuideIP Purity Basics
Understand common IP labels such as residential, datacenter, proxy, VPN, and leak signals in plain language.
Open GuideAuthenticator App Vs SMS
Compare convenience, recovery, and security trade-offs between app-based 2FA and SMS verification.
Open GuideCommon 2FA Mistakes
Review the backup and device-change mistakes that most often lead to account lockouts.
Open GuideWebRTC Leak Basics
Understand why browsers may expose additional addresses and how to read those results sensibly.
Open GuideHow To Read A Speed Test
Learn the practical meaning of latency, jitter, download, and upload in browser-based tests.
Open Guide