Getting Started
Welcome to ChemStitch
ChemStitch is a web-native chemical structure editor with built-in AI. Draw molecules, ask the AI about them — properties, reactions, retrosynthesis, naming — all in your browser.
The AI chat panel sits alongside the structure editor. Draw a molecule on the canvas and the AI sees it in real time. Ask about properties, predict reactions, plan synthetic routes, or look up compounds in PubChem — without switching tools.
Creating an account
ChemStitch is in closed beta. To get access, join the waitlist on the landing page. When a spot opens, we’ll email you when your account is ready.
On the login page, enter your email and click Sign in with magic link. If your email has been approved, we’ll send a magic link to your inbox — click it and you’re taken straight to the editor. No password required.
If your email hasn’t been approved yet, you’ll see a prompt to join the waitlist. Once approved, you can return to the login page and sign in with your magic link.
Drawing your first molecule
The editor opens with an empty canvas. You can start drawing immediately using the bond tools in the toolbar, or use a quick-start template — click one of the starter molecules (benzene, aspirin, caffeine) to load a structure onto the canvas.
Use keyboard shortcuts for fast editing: press 1, 2, or 3 to switch between single, double, and triple bonds. Press R to open ring templates. Press ? to see all available shortcuts.
Your first AI interaction
With a molecule on the canvas, type a question in the chat panel. The AI sees your current structure automatically — no need to copy or describe it.
Try: "What are the properties of this molecule?" The AI calls RDKit to compute molecular weight, logP, hydrogen bond donors and acceptors, topological polar surface area, rotatable bonds, and drug-likeness (Lipinski Rule of Five evaluation).
Property results are displayed with confidence indicators: Computed (green, deterministic via RDKit) for calculated values, and AI Suggested (yellow) for predictions that should be verified experimentally.
Document management
Your work auto-saves to the cloud. The save indicator in the header shows Saved, Saving, or Error.
From the documents page, you can create new documents, rename existing ones, and delete documents you no longer need. Each document preserves the canvas state and full chat history.