RegEx to find file names
You can use this regular expression search to find file names with a three character extension:
^[\w,\s-]+\.[A-Za-z]{3}$
![](https://static.wixstatic.com/media/af7fa4_88230442793c405ea87d89656c420291~mv2.jpg/v1/fill/w_130,h_246,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/af7fa4_88230442793c405ea87d89656c420291~mv2.jpg)
Change the number indicated in curly brackets at the end to account for longer extensions.
^[\w,\s-]+\.[A-Za-z]{4}$