FreeChemDraw is a comprehensive online chemical structure editing tool that allows users to draw, edit, and recognize chemical structures and reactions directly in their browser. This free tool supports the import and export of various formats, including MOL, SMILES, PNG, and SVG, making it ideal for research, teaching, and chemical information analysis. Users can upload or paste chemical structure images, and the system will automatically recognize and generate editable molecular structures. Key features include chemical reaction drawing, RNX file input, and high-quality image export. FreeChemDraw is designed to be lightweight, efficient, and easy to use, providing a reliable solution for chemical structure representation without the need for software installation.