Question

How do i write a regex to match anything ending with a number, then .jpg.

E.g:

10021321.jpg MATCH
1231.jpg MATCH
xxx.jpg NO MATCH
123123-resized.jpg NO MATCH

Answer 1

^.*[0-9]\.jpg$

will do this. This allows any characters before the final number + .jpg.

Edit: Since you only want to allow numbers and nothing else in the filename, use

^[0-9]+\.jpg$

(but this is not what you’re actually asking in your question).