Learn everything about 2FA and TOTP
Step-by-step guides, recovery tips, QR code explanations, and security best practices for authenticator codes.
How to Use Google Authenticator with Swift2FA
Learn how to move from a Google Authenticator QR code or secret key into Swift2FA so you can generate matching desktop codes.
Is Swift2FA Secure? What to Know Before Using a Browser-Based 2FA Generator
Understand the security model behind browser-based TOTP tools, what Swift2FA does locally, and the tradeoffs compared with phone apps.
What Is an otpauth URL? Format, Fields, and How It Powers QR-Based 2FA Setup
Understand the `otpauth://` format used by authenticator QR codes, including secret keys, issuer names, digits, period, and algorithm.
Best 2FA Apps in 2026: What to Use and Why
Compare the strengths of the most popular authenticator apps and decide which one fits your backup, sync, and security needs.
How 2FA Works: A Clear Guide to Codes, Tokens, and Trust
Understand how 2FA works, how TOTP codes are created, and why time-based verification is safer than passwords alone.
How to Find Your Google Authenticator Secret Key
Learn where secret keys come from, when they can be recovered, and how to verify them safely with a browser-based generator.
How to Recover 2FA Codes When You Lose Your Phone
A practical recovery checklist for lost phones, broken devices, and account lockouts involving authenticator apps.
What Is TOTP? The Time-Based OTP Standard Explained
Learn what TOTP is, how it differs from SMS verification, and why authenticator apps rely on it for secure login codes.