OTP input
A row of single-character boxes for entering a one-time code.
An OTP input is a row of small boxes where each holds one digit (or letter) of a verification code. As the user types, focus jumps to the next box automatically. Pasting fills all boxes at once.
Used for two-factor authentication, email verification, and phone number confirmation. The box-per-character style makes the code feel important and helps users notice typos.