SMILES to InChI Converter

Convert SMILES to standard InChI for search, indexing, and publication workflows.

File Format Explained

SMILES is a compact line notation for molecular connectivity. It is convenient for drawing tools, search boxes, and scripts.

InChI is the IUPAC International Chemical Identifier. It is a layered, standardized identifier designed for chemical database exchange, indexing, and comparison.

Use SMILES when you need an editable structure string. Use InChI when you need a standardized identifier that is less dependent on a specific SMILES canonicalization style.