Chemical Structure Drawer

• Free online chemical structure drawing tool that renders molecular structures from SMILES strings, auto-rendering as you type and also offering a manual "Render" button
• 10 built-in common compound templates (benzene, ethanol, acetic acid, glucose, caffeine, aspirin and more) load in one click, with hints for writing single bonds and ring structures
• Light/dark/auto themes, plus a live count of the atoms and chemical bonds in the molecule
• Copy the current SMILES string in one click, or export the structure as PNG or SVG; everything runs locally in your browser — your data never leaves your device

1. Open the tool page — no download or installation needed
2. Type or paste a SMILES string in the input box (or pick a template from the dropdown, or click "Example" to load caffeine); the atom and bond counts update on the left in real time
3. The structure auto-renders as you type, and you can click "Render" to redraw when needed; switch light/dark/auto theme, and any SMILES errors show a message on the canvas
4. Click "Copy SMILES" to copy the current string, or click "Export PNG / SVG" to download the drawn molecule

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — your data never leaves your device
• The SMILES string must follow its syntax (e.g. atoms connected by single bonds, closed-ring notations); invalid input shows a render error on the canvas, and export requires the structure to render first

Free online chemical structure drawing tool. Render and draw molecular structures from SMILES strings with common compound templates, supporting PNG and SVG export.

Open the tool page — no download or installation needed Type or paste a SMILES string in the input box (or pick a template from the dropdown, or click "Example" to load caffeine); the atom and bond counts update on the left in real time The structure auto-renders as you type, and you can click "Render" to redraw when needed; switch light/dark/auto theme, and any SMILES errors show a message on the canvas Click "Copy SMILES" to copy the current string, or click "Export PNG / SVG" to download the drawn molecule

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device The SMILES string must follow its syntax (e.g. atoms connected by single bonds, closed-ring notations); invalid input shows a render error on the canvas, and export requires the structure to render first

Yes, Chemical Structure Drawer is completely free. No download or installation required — it runs right in your browser.