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CHEMICAL STRUCTURE EDITOR

Draw chemical structures freely

A free, browser-based structure editor. No install required.

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  • Free
  • Browser-based
  • Private by default

Common structure drawing problems

Hand drawing is hard to clean up

Handwritten structures are difficult to reuse in polished material.

Complex tools slow you down

Learning dedicated software can take longer than the drawing itself.

Installing software is friction

Setup and updates get in the way when you need a quick structure.

Draw fast, share fast: a chemical structure editor for the browser

Ready instantly

No install. Open the browser and start.

Direct editing

Drag bonds and click atoms to adjust structures.

Auto generation

Generate from names, SMILES, CAS, or OCR.

Export support

Export as PNG or SVG.

Explore the main features

Read structures with OCR

Import structures from images and screenshots.

Draw bonds, arrows, and rings

Use common bond types, reaction arrows, and ring templates.

Customize colors and display

Adjust atom colors, labels, and bond styles freely.

How it works

A simple three-step flow from structure creation to sharing.

  1. 1

    Import

    Start from an image, file, or text input.

  2. 2

    Edit

    Refine structures directly in the browser.

  3. 3

    Export

    Export and share in the format you need.

FAQ

Is it really free?

Yes. Core editing features are free and do not require registration.

Do I need to install it?

No. MolSketch runs in the browser.

What can I export?

PNG and SVG export are supported.

Does it work on mobile?

Yes, any browser works, but a PC is more comfortable for precise editing.

Is my data stored on a server?

Editing history is stored in your browser's local storage, and exported files are saved on your device. Exported file contents are not sent to our servers. Some features, such as OCR and structure generation, may send input data to our servers or external services for processing.

Can I generate structures from SMILES or a compound name?

Yes. Enter a SMILES string, CAS number, or compound name to generate from over 100 million structures.

Draw chemical structures freely with MolSketch.

Start now

No registration required