THM is a JPEG with a different extension
A .thm file is a small JPEG thumbnail cameras save next to a photo or video so devices can preview it quickly. Its contents are identical to a JPG — only the extension differs.
Curious about PS2 to THM? Here's what THM actually is — and why there's nothing to convert.
There's no real "convert PS2 to THM" — a THM file is simply a JPEG thumbnail a camera writes alongside a photo or video.
A .thm file is a small JPEG thumbnail cameras save next to a photo or video so devices can preview it quickly. Its contents are identical to a JPG — only the extension differs.
Because THM is created automatically by the camera, there's no use case for turning a PS2 into one. If you have a THM, just rename or convert it to .jpg to view it.
THM is a small JPEG thumbnail saved alongside camera photos and videos — really a JPEG with a different extension.
How to open Rename or convert THM to .jpg to open it anywhere.
Full THM format guide