Ketcher is a web-based chemical structure editor for drawing small molecules, biomolecules, and chemical reactions in a browser.
It’s aimed at chemists, laboratory scientists, technicians, academics, and students, and can be integrated into other web applications either as a React component library or as a ready-to-run embedded application.
This is free and open source software.
Key Features
- Supports reaction editing with reaction centers, mapping, catalysts, conditions, and related reaction data.
- Provides stereochemistry handling, including R/S, r/s, and E/Z labels, plus ambiguous AND/OR group marking.
- Includes S-group and R-group tools with support for SRU polymers, superatoms, data S-groups, R-sites, and R-logic.
- Imports and exports a wide range of chemical and biomolecular formats, including Molfile, SDF, RDF, SMILES, SMARTS, InChI, CDXML, FASTA, IDT, and HELM.
- Offers template and monomer libraries containing hundreds of predefined molecular and macromolecular building blocks.
- Supports RNA-focused workflows such as nucleotide assembly, antisense strand creation, and synchronous or asynchronous duplex editing.
- Provides a JavaScript API for loading, saving, modifying, and exporting structures from applications.
- Can be deployed as a React component library or embedded as a standalone web application.
Website: github.com/epam/ketcher
Support:
Developer: EPAM Systems
License: Apache License 2.0
Ketcher is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| Chemistry: Chemical Structure Drawing | |
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| Molsketch | Draw molecular structures and export publication-ready graphics |
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