2FA Backup Codes Generator
Generated locally in your browser with the Web Crypto API. Codes use an unambiguous lowercase alphabet that omits 0, o, 1, l, and i. Copy the batch as lines, CSV, or a JSON array.
One-time two-factor recovery codes
Generate a batch of 2FA backup codes in the recognizable xxxxx-xxxxx shape that GitHub, Google, and similar services hand out when you enable authentication. Use them to seed account-security screens, fill “save your backup codes” flows, and build fixtures for settings pages and onboarding tests.
These codes are fixtures only — nothing leaves the browser and they are not tied to any real account. Adjust the count from 5 to 20 codes to match the screen you are mocking.