I would have a hard time using a service like this. I was able to take a resume in almost any format (even a .pdf where I can't copy the words out of it) and completely rewrite it and output it to another .pdf or .doc file with codex in a few minutes.

I even made a report builder (so I don't have to keep using tokens) Python script where it takes markdown and outputs a professional .pdf/report. This took about 15 minutes and some manual tweaks.

AI will destroy some of these one idea/function based small-sites like this. I think there are many non-tech people that will still get some value out of it, but it's only a matter of time before it's a few clicks away.