SMILES to InChIKey Converter

Generate compact InChIKey identifiers from SMILES strings.

File Format Explained

SMILES is a compact text notation for molecular structure. It is useful for input, editing, and conversion workflows.

InChIKey is a fixed-length hashed identifier derived from an InChI. It is designed for fast database matching and web search, but it cannot be reversed perfectly without a database lookup.

Use InChIKey when you need a stable search key for a compound; use SMILES when you need an editable structure string.