Free Molecular Structure Builder & 3D Molecule Viewer
ChemScope lets you draw 2D chemical structures, view molecules in 3D and look up more than 900 compounds. It is built for chemistry students, teachers and curious learners who want to see how atoms bond and how molecules are shaped, without installing software.
Search a compound by name to see its formula, molecular weight and structure, or build your own molecule atom by atom. Rotate the 3D model to understand geometry such as bent, tetrahedral and trigonal planar shapes.
Draw structures
Place atoms and bonds on the canvas to build organic and inorganic molecules.
See molecules in 3D
Rotate and zoom to understand bond angles and molecular geometry.
Search 900+ compounds
Look up formulas, molar mass and structures by name.
Great for AP and college chemistry
Practise Lewis structures, VSEPR shapes and functional groups.
How to use it
- Search a compound or start a new drawing.
- Add atoms and bonds to build your structure.
- Switch to the 3D view to rotate the molecule.
- Check the formula and molecular weight.
Frequently asked questions
Is ChemScope free?
Yes, it is free to use with no signup.
Can I view molecules in 3D?
Yes. Switch to the 3D view to rotate and zoom any structure.
What is VSEPR theory?
VSEPR predicts molecular shape from the repulsion between electron pairs around the central atom.
Can I calculate molecular weight?
Yes. The formula and molecular weight are shown for the structure you build or search.