Batch Chemical Format Converter
Convert hundreds of molecules in one go. Upload an SDF or paste a list of SMILES, choose an output format, and download the whole converted file.
Why batch conversion?
Most chemistry work happens on libraries, not single molecules. This tool runs OpenBabel over every record in your file in one pass, so a 1000-compound SDF becomes a clean SMILES list in seconds instead of 1000 manual conversions.
Supported inputs
- SDF / SD — multi-record structure files, the standard for compound libraries
- SMILES list — one molecule per line
- MOL2, PDB, XYZ, InChI and any other readable OpenBabel format
Frequently asked questions
How large can the file be?
Up to 8 MB of text, which is roughly 20,000–50,000 SDF records depending on molecule size. Conversion runs with a 5-minute server-side timeout.
What if some records fail?
OpenBabel skips records it cannot parse and reports how many were converted. The output keeps the successful ones in their original order.
Can I convert to different formats per record?
No — one run produces one output format. Run the tool again with a different target format if you need several.