| Format | Best for | Why | | :--- | :--- | :--- | | | Web, presentations, Word | Lossless, supports transparency, no compression artifacts. | | SVG | Websites, responsive documents | Scalable vector, infinite zoom. | | PDF | Publications, theses | Preserves vector quality, searchable text. | | CDXML | Collaboration with ChemDraw users | XML-based, editable, open-like. | Recommendation: Use PNG instead of JPG for chemical structures unless file size is absolutely critical. Part 8: Summary – Which Method Should You Choose? | Your situation | Recommended method | | :--- | :--- | | I have ChemDraw | Native Save As > JPEG (perfect quality) | | I need quick, one-off conversion, no sensitive data | Online converter (Convertio or Zamzar) | | I have many CDX files and no budget | ChemSketch + manual export or Indigo CLI | | I have sensitive/proprietary structures | Local software only (ChemSketch or Indigo) | | I only need a rough preview | Screenshot from a free viewer | Final Verdict Converting CDX to JPG is straightforward if you understand the tools available. For occasional use, free software like ACD/ChemSketch or a trusted online converter works well. For high-volume or confidential work, invest time in learning command-line tools like Indigo or use the native export in ChemDraw.
# Convert all CDX to SVG obabel *.cdx -O output.svg for file in *.svg; do convert "$file" -background white -flatten "$file%.svg.jpg" done Option C: Indigo Batch Script Indigo (open-source) offers batch conversion: convert cdx to jpg
For Each file In Files Open file ExportAs JPEG, resolution:=300 Next Open Babel can convert CDX to SVG (vector), then ImageMagick converts SVG to JPG. | Format | Best for | Why |
indigo batch -i input_dir -o output_dir -f jpg | Problem | Likely Cause | Solution | | :--- | :--- | :--- | | JPG is blurry | Too low resolution | Set at least 300 DPI during export. | | Text is garbled | Font missing (e.g., Arial, Times) | Install ChemDraw fonts or convert on a machine with ChemDraw. | | Background is black or transparent | JPG does not support transparency | Add white background in export settings or use an image editor to fill. | | File won't open in online converter | File too large or corrupted | Try a desktop tool like ChemSketch. | | Bonds look thick and uneven | Anti-aliasing off | Enable anti-aliasing in export dialog. | Part 7: Alternatives to JPG – Better Formats for Chemical Structures Before settling on JPG, consider these superior alternatives for sharing chemical diagrams. | | CDXML | Collaboration with ChemDraw users
Remember: JPG is a , not an archive format. Keep your original CDX files safe, and convert a copy to JPG only when you need to share or publish. Still have questions about CDX or JPG conversion? Leave a comment below or check the official ChemDraw documentation for advanced export settings. If you are a developer looking to automate CDX conversion, explore the Indigo Toolkit’s API for programmatic rasterization.