openbabel

Reads, writes, and converts over 90 chemical file formats including SMILES, InChI, and PDB, as explicitly stated in the README, ensuring broad data interoperability.

Enables filtering and searching molecular files using SMARTS patterns and other chemical query methods, allowing precise data analysis.

Generates 2D and 3D coordinates for representations like SMILES and InChI, facilitating visualization and modeling workflows.

Provides both ready-to-use command-line programs and a complete API for integration, making it adaptable for quick tasks or custom applications.