My file converter app has had 185,000 site visitors and earned $85k.

I built it before vibe coding was a thing.

Despite a mountain of AI-generated clones popping up, it's still doing well.

Two reasons why:

It runs completely locally (your files never touch a server like every online converter)

Supports almost any file type (5,438 document, video, image and audio conversions instead of just images, video or just docs)

Started as a side project. Now it takes up almost all my time.

If you want to get the app, you can check it out at howtoconvert.co