Draw the structural formula of a compound, or write out a reaction, directly in the browser.
JSME
Draw a structural formula, a reaction or a single molecule. Nothing on this page is saved anywhere, so export the result in one of the formats offered: SMILES, MOL, SVG and others.
To find out what a compound is called from its formula: draw the structure, press the button with the triangles in the second row and choose «Search chemical structure (through InChIKey)».
PubChem
The editor of the United States National Center for Biotechnology Information. The interface is dated, but it exports to a great many formats.