Sure, there are several ways to convert images to PDF online. If you don't want to install any software or deal with watermarks, I suggest using a lightweight browser-based tool.

I recently used a free tool at PDFQuickly – Image to PDF and found it really fast and easy. You can upload JPG, PNG, or even WebP images and instantly convert them into a single PDF. There's no sign-up, no watermark, and it works across all devices — including mobile.

It also supports drag-and-drop reordering and bulk uploads, which is great when working with scanned images or screenshots.

Hope this helps someone looking for a quick and free solution.