Molecule Builder
Build molecules digitally as a foundation for reactions, materials design, and AI-assisted discovery.
You can explore and render molecules without an account, but you’ll need to sign in to save projects.
Tip: paste a SMILES, or use PubChem lookup below. Rendering runs locally in your browser.
Rendering…
Rendered locally using OpenChemLib.
Computed (local)
Formula
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Mol. weight (approx)
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logP
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Polar surface area
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Rotatable bonds
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Stereo centers
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These are heuristic calculations for rapid iteration—use a validated cheminformatics backend for production.