If you want, tell me which software you have (ChemDraw, ImageMagick, GIMP, or none) and whether you need a single file or batch conversion, and I’ll give step-by-step commands.
JPG is a "lossy" format. For chemical structures with sharp lines and text labels, PNG is often better than JPG because it preserves hard edges without artifacts. If your converter allows it, choose PNG instead of JPG for line art. convert cdx to jpg
Converting from a structured, editable vector format to a flat raster format like JPG has specific benefits and trade-offs. If you want, tell me which software you
Privacy and safety
Imagine you have drawn a complex organic synthesis pathway in ChemDraw. You want to email it to a colleague who does not have ChemDraw installed. If you send the .cdx file, they will see an error or gibberish. If you send a JPG, they can open it instantly on any device. This is the core reason for conversion. If your converter allows it, choose PNG instead