Backup / Recovery Code Generator
Generate a set of backup codes in the same format real two-factor authentication systems use — for testing account recovery flows without touching a live account.
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How the Backup / Recovery Code Generator works
Codes use only uppercase letters and digits with the visually ambiguous characters removed — no 0/O, 1/I/L, or similar look-alikes — the same practice real backup-code systems use so a user reading a printed or displayed code aloud, or typing it manually, doesn't misread a character. The two-group-of-five format matches the style used by many real two-factor authentication systems.
How to use it
Frequently asked questions
Are these real, usable backup codes?
No — they're not tied to any real account or authentication system; they're formatted test data for building and testing your own recovery-code UI or flow.
Why are certain letters and numbers excluded?
Characters like 0/O and 1/I/L are easy to confuse with each other in many fonts — removing them is standard practice for any code a human might need to read or type accurately.
How many codes does a real service usually generate?
Most major services issue 8-10 single-use backup codes per set, which is why that's the default here.