Free · Private · Client-side
Backup Codes Generator
Generate secure backup codes for two-factor authentication recovery. Store these safely - they're your last resort if you lose access to your 2FA device.
Generated values never leave this device.Estimated entropy: 41 bits · 36-character pool · per 8-character code~1 seconds to crack at 1 trillion guesses/sec
Weak · <50 bitsFairGood · 70+Strong · 100+
In plain terms: a single gaming PC guessing a million passwords per second would crack this in about 13 days. Don’t use it for anything that matters.
Generated backup codes
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Each code can only be used once — store the file securely.
Using backup codes
- Each code can typically only be used once
- Cross off or delete codes after using them
- Generate new codes before you run out
- If you think codes are compromised, regenerate immediately