ChemPencil is a powerful and easy to use Mac App for drawing organic molecules.

ChemPencil tools and features include:

• Draw bonds and molecules in ACS standardized style.
• Label heteroatoms directly in the drawing without losing sight of your document.
• Add common abbreviations to atom’s labels.
• Heteroatom’s labels rearrange conveniently when rotating the molecule.
• Represent bond stereochemistry with hashed and bold bond type.
• Ring building tools to draw aromatic and aliphatic rings.
• Add text to the document for example for naming a molecules or naming a reaction scheme.
• Export or email your document as a PDF.
• Select and copy molecules in ChemPencil and paste them directly in your Keynote document.
• Calculation and plot of isotopic distribution graph.

What’s New

Version 1.3

- Grid and rulers.
- Customize elements fonts and colors.
- Several bug fixes and improvements.

Ratings and Reviews

1.0 out of 5
5 Ratings
5 Ratings
Chempencilcrashes ,

Crashes every time!

Download today. MacBookPro completely up to date. Chempencil would not accept text entry and crashed every time.
Requested refund and waiting for this to be processed.

JMOstrowick ,

missing a few things


I'd like to be able to draw normal structural formulae, e.g. of alkanes... not only phenols and other fancy things. Please add this feature. Also I don't see how to move/drag molecules I've drawn.
Please fix.

Smithicals ,

like the idea but not worth it

no benzene (delocalised model) and very hard to get good looking molecules.


Code Maker Inc.
5.8 MB
OS X 10.8 or later
Age Rating
Rated 4+
© Code Maker Inc.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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