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Asked: 2026-06-12T02:59:05+00:00

i have a regex ^[a-zA-Z0-9]{0,14}$ which will allow only alphanumerics. but there is problem

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i have a regex
^[a-zA-Z0-9]{0,14}$
which will allow only alphanumerics.
but there is problem i dont want a username to be only numbers and this regex is accepting only numbers also
like 56426542
so how to restrict only numbers

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1 Answer

  1. Editorial Team

    The regex you want:

    ^((?=.*[a-zA-Z])[a-zA-Z0-9]{0,14})$

    Regex sandbox to play in with it.

    This won’t force you to have to start with a letter. The username can start with a letter or a number, an ensures that the username isn’t only numbers.

    Edit: fixed the length check. Also, you might want to change the {0,14} to {1,14}. Well, replace the first number with your minimum length requirement.

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