If you have ever worked with chemical structures, molecular diagrams, or reaction schemes, you have likely encountered the CDX file format . Developed by CambridgeSoft (now PerkinElmer), CDX is the native file format for ChemDraw , the industry-standard software for chemical drawing.
| Use Case | Recommended DPI | JPG Quality | | :--- | :--- | :--- | | | 96 - 150 DPI | 80% | | PowerPoint | 150 - 200 DPI | 85% | | Print Journal | 300 DPI | 95-100% | | Poster | 600 DPI | 100% | convert cdx to jpg
Saves hours of manual work. Cons: Requires technical setup. Method 4: The "Print to JPG" Workaround (No Extra Software) If you have a CDX viewer but no direct export option, you can use the "Print Screen" method, but refined. If you have ever worked with chemical structures,
However, sharing these files can be problematic. A colleague without ChemDraw cannot open a .cdx file. You cannot embed a CDX file directly into a PowerPoint presentation, a Word document, a website, or a social media post. This is why converting is essential. Cons: Requires technical setup
JPG (or JPEG) is a universal image format supported by every operating system, browser, and mobile device.
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. Common Problems and Troubleshooting 1. "My JPG looks blurry or unreadable." Fix: Increase the DPI setting during export. Never take a screenshot of a small CDX file and enlarge it. Always export directly at high resolution. 2. "The background is black/transparent, but I need white." Fix: In ChemDraw, go to Object > Apply Color Scheme > Black on White before exporting. In online converters, look for a "Background" checkbox. 3. "My CDX file contains multiple pages/objects." Fix: Most converters only capture the first page or the active selection. In ChemDraw, group all objects ( Ctrl+G ), then export. 4. "I need to preserve chemical metadata." Warning: JPG does not store chemical structure metadata (like SMILES or InChI keys). If you need the chemical data, keep the original CDX file and export a JPG copy . CDX vs. CDXML: What's the Difference? You might also see CDXML files. This is the XML-based version of CDX. Most CDX converters also handle CDXML. If a tool says "CDX to JPG," it will likely accept .cdxml files as well. If not, simply rename .cdxml to .cdx (often works) or open it in ChemDraw and re-save as .cdx . Conclusion: Which Method Should You Choose? Let's summarize: