10 Chemical structure drawing online free tools

Are you a scientist looking for an efficient way to draw chemical structures? Various online free tools are now available to make the process a breeze. From basic drawing tools to more advanced programs, the right tool can make the difference between an accurate representation of a complex chemical structure and a messy diagram. Discover the best online free tools for chemical structure drawing and find the perfect fit for your needs.

What is chemical structure drawing?

chemical structure drawing

Chemical structure drawing is the process of illustrating the structural elements of a chemical compound using symbols and diagrams. This kind of drawing allows chemists to communicate their ideas to other chemists in a universal language.

Chemical structure drawings represent molecules, ions, and other substances with an ordered arrangement of atoms. Commonly used symbols include circles, squares, diamonds, lines, and labels which denote types of atoms or bonds between them. Combining these elements can create an image that accurately depicts a molecule’s molecular geometry and connectivity.

How to draw chemical structures online?

Drawing chemical structures online is a great way to understand the science behind chemistry better. You can easily draw and share complex molecular diagrams with colleagues or classmates with the right tools. Here’s how to do it: 

1. Find an online tool that suits your needs – several different programs make drawing chemical structures easier than ever. Some even provide helpful tutorials to help you learn how to use the program effectively. 

2. Gather all of your necessary materials – you will need access to some basic elements (like carbon, oxygen, and hydrogen) and more complex molecules like benzene and amino acids. Gather all these items before you begin drawing so you don’t have to stop in the middle of your project to look for something else. 

3. Start by creating a simple structure – start by drawing out a carbon-hydrogen bond (or “C-H”) and then create bonds between other atoms based on their bonding rules (such as single or double bonds). If you have trouble understanding these rules, consult an online reference guide or textbook for help. 

4. Build upon your initial structure – once you have drawn out the basic shape of a molecule, continue adding new atoms to create more complex molecules like amino acids or proteins. If needed, take advantage of different symbols used in organic chemistry such as wedges and dashes. 

5. Label each atom accordingly – labeling each atom properly is important when communicating complex ideas quickly and accurately within scientific circles. For accuracy, identify each element using its corresponding symbol from the periodic table and its number of valence electrons. 

6. Change the shape if needed – if you want your diagram to be perfectly symmetrical or display certain features clearly, feel free to adjust the overall shape by stretching individual sections without destroying any bonds between atoms . This is often done when presenting diagrams in lectures or showing data visually during research projects 

7. Save your work – once you’ve finished drawing out your desired structure, save it onto your computer for future use or inspection later on. it’s important to save it somewhere safe like a USB drive or cloud storage service so that you don’t lose any progress should something happen during the creation process such as a power outage or computer crash.

10 online free tools for drawing chemical structures

There are many great free options available for drawing chemical structures. Whether a scientist, student, or hobbyist, these tools can help you create accurate and aesthetically pleasing diagrams of various molecules and compounds. Here are some of the best free software programs that make it easy to draw chemical structures: 

1. ChemDoodle

ChemDoodle is the perfect software for chemists looking for a powerful, easy-to-use tool. It offers unique features that go beyond the standard drawing and sketching tools, making it ideal for both professional and amateur chemists.

ChemDoodle allows chemists to customize templates for their specific needs, making it easier to draw structures and reactions quickly. It features automatic placement of bonds, atoms, and groups, and an easy drag-and-drop feature for quickly adding elements. ChemDoodle lets you export high-resolution images in numerous formats, including PNG, JPG, SVG, and PDF.

ChemDoodle also offers a variety of features for more advanced users, such as the ability to draw resonance structures, staggered conformers, and cyclic compounds. You can also use its powerful 3D viewing feature to view and rotate molecules in three dimensions. With the ability to save and share your drawings, you can easily collaborate with colleagues and students.

2. MarvinSketch 


If you’re a chemist, biochemist, or anyone else who needs to create, modify, and visualize molecular structures, then you should check out MarvinSketch. This open-source program from ChemAxon has been designed to provide an intuitive and user-friendly interface for designing molecular structures and reactions.

MarvinSketch is packed with features that make it a great choice for anyone looking to get started with molecular structure design. It has a powerful bond editing capability that allows you to quickly and easily change existing structures. It also has an impressive range of structure prediction tools that can help you find the ideal structure for a given molecule. MarvinSketch has rotation and translation options, making it easy to move, rotate, and resize molecules to get the perfect look.

In addition to its impressive features, MarvinSketch also supports multiple file formats. This means you can easily open and save SDF, XML, or other files – making it ideal for anyone working with a wide range of molecular structures.

3. KDraw Chem 

KDraw Chem is an open-source program designed with users in mind. It offers a simple and intuitive user interface, making it easy to create molecular diagrams. This molecular diagrams editor is excellent for chemistry students, research labs, and industry professionals who need to create accurate molecular diagrams quickly and easily.

KDraw Chem can perform basic atom manipulation and bond generation/editing. It includes features like symmetry control and customizable options for controlling the size and shape of the atoms. It also allows you to save your work in SVG format for printing or sharing online.

KDraw Chem is an excellent choice for users who want to create accurate molecular diagrams quickly and easily. Its user-friendly design makes manipulating atoms, bonds, and symmetry simple. It also comes with several customizable options to increase accuracy and aesthetics.

4. JME Editor 

The JME Editor is a revolutionary web-based tool developed by Peter Ertl from Novartis Institutes for BioMedical Research Vienna. This editor lets anyone quickly and easily construct 2D chemical structures without downloading anything onto their computer.

The JME Editor is a simple yet powerful tool that makes drawing chemical structures a breeze. With this editor, you can easily draw chemical bonds, add labels and annotations, and easily adjust your structure. You can also save it in various formats, such as MDL Molfile, SMILES, CML, PNG, and SVG.

The editor is extremely intuitive, allowing you to draw your structure with just a few clicks. It also supports a range of input formats, including SMARTS, OEChem, RDKit, InChI, and CML. The editor also allows you to easily adjust and customize your structure, giving you full control over the appearance and structure of your molecule.

5. CrystalMaker X

CrystalMaker X is a powerful and comprehensive Mac OS X-only program that is specifically designed to help scientists create and visualize crystal lattices and molecular packings. This program is the perfect tool for chemists, materials scientists, and other scientists working with crystalline systems.

CrystalMaker X has many features that make creating and visualizing crystal lattices and molecular packings easier. Its intuitive user interface allows users to build, edit, and animate 3D models easily. 

One unique feature CrystalMaker X offers is its ability to animate individual particles in the model simulations. This allows users to visualize the motion of particles within their model and helps them understand the behavior of particles in their simulations more easily. This is particularly useful for simulations that involve crystalline systems, as understanding the motion of particles can be difficult without animation.

6. MolView

MolView is a web-based application that makes it incredibly simple to share molecules. It allows users to upload their files directly into a browser window with a URL or file drop box. With an intuitive user interface, users can also easily edit existing compounds or create new ones from its library of over 14 million compounds that span all major chemistry disciplines. 

MolView makes it easy for researchers and professionals to collaborate on complex molecules. It provides many tools that allow users to easily manipulate, visualize, analyze, and share 3D molecular models. In addition, the application’s powerful search engine allows users to find the exact molecule they are looking for quickly.

With MolView, teachers can easily create visual materials to help students better understand complex topics in chemistry. It also has features that allow students to interactively explore the structure of molecules and view detailed information about them.

7. Chem-space


Chem-space is an online specialty chemical provider that provides a wide range of compounds for new drug discovery or medicinal chemistry. With an impressive catalog of over 1.3 billion chemical compounds, Chem-space makes it easy to find the exact compound you need for your project.

Whether you’re working on a complex chemical structure or need to find a specific compound quickly, Chem-space has you covered. Their online chemical search tool makes it easy to search their database for an exact match, a substructure, or a similar structure.

The search tool is incredibly intuitive and easy to use. Just draw the chemical structure you’re looking for and hit enter. You’ll be presented with your desired compound in seconds, saving you time and energy. This feature is especially useful for complex chemical structures.

8. ChemSpider

ChemSpider is a chemical search engine own by the Royal Society of Chemistry. This search engine has come a long way since it was first released in 2007, and it now provides a comprehensive online tool to search billions of chemical structures.

Remembering their complex and long names can often be difficult when working with chemical structures. Thankfully, ChemSpider provides an easy and accurate way to search for unique chemical structures by using its online tool.

The ChemSpider online tool allows users to draw chemical structures, which it can then use to search a database of millions of compounds. It is possible to draw almost any chemical structure using this online tool, and it is easy to use and responsive.

However, ChemSpider is less user-friendly than other chemical search engines such as Chem-space. Chem-space is known for its user-friendly interface and its ability to allow users to search for chemical structures quickly.

9. ChemDraw

ChemDraw is an essential tool for chemists, biologists, and other scientists. It is the most comprehensive and powerful drawing tool used for communication chemistry research. ChemDraw allows users to draw chemical structures, reactions, biological objects, and pathways. It is also an invaluable tool for predicting properties and spectra, converting chemical structures to IUPAC names, and viewing 3D structures. 

ChemDraw includes Struct/Name, ChemDraw/Excel, and ChemNMR, each providing unique features. Struct/Name creates correct structures from chemical names, and ChemDraw/Excel enables users to include chemical data from their spreadsheets in their drawings. ChemNMR estimates NMR spectra from a ChemDraw structure with the direct atom to spectral correlation. 

10. ChemSketch

ChemSketch is an incredibly powerful and versatile drawing package that allows you to draw chemical structures in various formats. It is a drawing package that allows users to draw chemical structures, including organics, organometallics, polymers, and Markush structures.

ChemSketch is a powerful tool to draw and edit chemical structures, explore them in three-dimensional space, and even predict their properties. With ChemSketch, you can quickly create 2D drawings of chemical structures, calculate molecular properties like molecular weight, density, molar refractivity, and logP, clean and view 2D and 3D structures, and even name the structures based on the IUPAC nomenclature.

The software provides an intuitive user interface allowing users to create and modify chemical structures easily. Its comprehensive features, including the ability to customize bond lengths, bond angles, and atom types, make it a great choice for any chemist who needs to create accurate representations of chemical structures.

Why is chemical structure search important?

Understanding the chemical structures of molecules is essential in various scientific and industrial settings, from drug discovery and materials research to commercial production. Chemical structure search technology provides a way to identify substances based on their molecular composition quickly.

With it, researchers can rapidly ascertain whether existing compounds are suitable for a particular application or narrow down the candidate list when searching for new compounds with specific characteristics. This makes chemical structure search an invaluable tool that has revolutionized how scientists, engineers, and entrepreneurs approach research questions in chemistry.


In conclusion, free online tools for chemical structure drawing are essential for chemists and other professionals in the field of chemistry. They provide an easy, accessible, and cost-effective way to quickly draw chemical structures and help to facilitate research and understanding of chemical reactions.

With the increasing availability of these tools, it is now possible for anyone to quickly and accurately draw out complex chemical structures and reactions. Furthermore, these tools can be used as a starting point to develop more advanced methods and techniques of drawing chemical structures.

Maria Zhang

Maria Zhang

Maria Zhang, an experienced chemical industrial expert with more than 10 years of experience. She has worked with a range of industries, from large-scale manufacturing and research to smaller-scale projects. With her expertise, you can learn differently chemical knowledge!

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