SDF to InChI Converter

Paste an SDF or MOL block and convert it into a standard InChI string.

File Format Explained

SDF stores molecule records with MOL-style atom and bond blocks plus optional property fields. It is common for compound libraries and screening datasets.

InChI is a standardized IUPAC identifier that represents a molecule in layered text form. Converting SDF to InChI helps create stable identifiers for search, indexing, and deduplication.

If an SDF contains multiple records, convert and verify records carefully. Structure salts, mixtures, stereochemistry, and missing hydrogens can affect the resulting InChI.