Laboratory apparatus
Tiltable test tubes, round-bottom and flat-bottom flasks, conical flasks, beakers with liquid levels, spirit burners, tripods, stands with clamps, funnels, filter paper, thermometers, measuring cylinders.
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Open professional modeFull screen with layers, properties and JSON — your current drawing is keptHow to use AI mode
Draw lab setups and structural formulas with AI
Describe the experiment and the tool assembles the flask, delivery tube, burner and water trough the way they are really connected. Type a substance name and it draws the structural formula with single, double and triple bonds according to valence. Turning ethanol into ethene is a one-word change — the double bond appears by itself.
- Standard apparatus: test tubes, round and flat-bottom flasks, conical flasks, beakers, burners, stands, delivery tubes, funnels, water troughs, thermometers
- Structural formulas with a library of 18 common molecules, automatic layout for straight chains, branches and the benzene ring
- Reaction schemes with condition arrows, reversible reactions, chemical labels and notes
- Free, no sign-up, runs in your browser
- Free
- No sign-up
- Runs in your browser
What you can draw for chemistry
The tool understands the chemistry of a figure: apparatus has a mouth to take a stopper, atoms have valence to form bonds, so one edit rebuilds the figure correctly.
Gas preparation and collection
Stoppers with holes, delivery tubes bent along the path you describe, collection by displacement of air or of water in a trough, bubbles, arrows showing escaping gas.
Distillation, filtration, dilution
A simple distillation set with flask, condenser and a receiving tube in cold water. Filtration with funnel and filter paper. Pouring acid into water with an arrow and a safety note.
Structural formulas
The library includes water, methane, ethane, ethene, ethyne, propane, methanol, ethanol, acetaldehyde, acetic acid, benzene, CO₂, NH₃, HCl, H₂, O₂, N₂ and SO₂. For other substances, list atoms and bonds and the tool lays them out.
Correct bond orders, element colors
Single bonds as one line, double as two, triple as three. Oxygen red, nitrogen blue, chlorine green for readability — still distinguishable in black and white thanks to the symbols. Show or hide hydrogen atoms with one button.
Reaction schemes
Several molecules on one line, reaction arrows with conditions written above such as conc. H₂SO₄, 170°C, double arrows for reversible reactions, plus signs and by-products.
Sample figures drawn by the tool itself
Real output of the tool, opens ready to edit. The prompt used is shown underneath.
How to draw chemistry figures in AI mode
The Chemistry tab covers both lab apparatus and molecules. Describe in words as in a textbook and the tool picks the right kind of figure.
Open the tool on the Chemistry tab
One tab for both kinds of figure. Problems about preparation, distillation or filtration produce apparatus; problems about structural formulas, molecules or reactions produce atoms and bonds.
TipFor a setup with many pieces, describe from left to right in the direction the gas flows to get a tidy layout.Describe the apparatus and connections, or name the substance
For example: Prepare CO₂ from CaCO₃ and HCl solution in a conical flask, collect the gas by displacement of air in a jar. Or: Draw the structural formula of ethanol showing every H atom. Substances in the library only need their name.
TipName the substance in each vessel and the tool labels the apparatus, so the exam needs no extra caption.Click Draw and check the assembly
Check that the stopper is in the flask mouth, the delivery tube runs the right way and liquid levels make sense. For molecules, count the bonds on each atom. The AI sees line lists the number of apparatus pieces or of molecules, atoms and bonds.
TipEvery atom is a real point, so you can write bond lengths or mark bond angles just as in geometry.Edit with short commands or suggestion chips
Type Change the molecule to ethene, Make the C–C bond double, Hide the H atoms, Add a burner heating the tube, Add bubbles in the flask, Change the substance to KMnO₄. Chips above the AI box are generated from the current figure — click one to fill it in.
TipRenaming a molecule changes its real structure — double bonds and hydrogen count are rebuilt, not just redrawn.Drag and arrange
Drag apparatus to move it, select to scale or rotate, tilt a test tube with the rotate handle. For molecules built from individual atoms, Auto-arrange lays them out along the chain according to the bonds. The library in Advanced mode lets you drop flasks, burners and stands where you need them.
TipChemical labels can be dragged if they overlap apparatus.Copy into Word or export a file
Copy figure to paste into an exam, export transparent PNG for slides, or SVG for Word and PowerPoint. Name the figure and pick a background in the Export panel.
TipStructural formulas in printed exams look best as SVG so bond lines stay thin and even.
Sample prompts for chemistry
Copy a prompt below, paste it into the description box and change the substance or apparatus to match your problem.
Draw the setup for preparing CO₂ from CaCO₃ and HCl solution, collecting the gas by displacement of air.
Conical flask with stopper and delivery tube, collection jar labeled CO₂, arrow for escaping air.
Draw the setup for preparing O₂ by heating KMnO₄ in a test tube, collecting the gas over water.
Test tube tilted mouth slightly down, burner beneath, water trough and inverted jar.
Draw a simple distillation: heat the solution in a flask, the vapor condenses along the tube into a test tube standing in a beaker of cold water.
A thermometer at the flask mouth if you mention it.
Draw the structural formula of ethanol C₂H₅OH showing every H atom.
The C–C–O chain is horizontal with the OH group on the right, as in textbooks.
Draw the reaction scheme for the dehydration of ethanol to ethene at 170°C with concentrated H₂SO₄ as catalyst.
Two molecules on either side, conditions on the arrow, plus H₂O.
Draw the structural formula of benzene C₆H₆ as a hexagonal ring with alternating double bonds.
A regular ring with six H atoms pointing outward along the radii.
Uses in teaching and learning chemistry
A few situations where teachers and students use the tool every day.
Apparatus and assembly questions
Exams often ask which gas a setup prepares, how it is collected and what is wrong. Build the correct setup, then deliberately change one thing with a command to create a spot-the-error question.
ExampleCollecting a water-soluble gas over water: students point out the mistake.
Structural formulas in organic questions
Isomer, nomenclature and addition-reaction questions need correctly drawn structural formulas. Name a library substance or list the atoms, then export SVG for the printed exam.
ExampleIsomers of C₄H₁₀: list two chains and the tool lays out the straight and branched forms.
Reaction schemes on slides
Conditions written on the arrow, full molecules on both sides. Change one substance for the next slide's reaction.
ExampleThe chain ethanol → ethene → polyethylene across three slides.
Pre-lab instruction sheets
Print a sheet with the assembled setup for students to study beforehand, highlighting safety-critical parts with labels.
ExampleAcid dilution sheet: arrow for pouring acid into water, note to stir.
Students draw to understand structure
Students draw a molecule themselves, toggle hydrogen atoms and change bond orders to see the formula change — no specialist chemistry software needed.
ExampleFrom ethane to ethene to ethyne, watching the hydrogen count fall.
Editing and exporting
Drag and the figure follows, relationships stay true
Drag vertex B and the altitude AH stays perpendicular to BC, midpoint M stays in the middle, a right triangle stays right. The tool stores constructions, not strokes, so you can edit freely without breaking the mathematics.
Toolbar right where you click
Click a segment to make it dashed, add an arrow or show its length. Click a triangle to make it free, right, isosceles or equilateral and to show angle measures and side lengths. No property panel to open.
Scale and rotate like Figma
Select an object to get handles: drag a corner to scale uniformly, drag an edge to change width or height, drag the round handle to rotate. Drag a whole group and every dependent point follows.
Paste into Word at the right size
Copy figure puts an image on the clipboard for Word, PowerPoint or Google Docs. Export SVG for crisp printing — one grid cell equals 1 cm, so printed measurements are exact. Transparent PNG for slides.
A share link carries the whole figure
The share button creates a link that contains the full drawing. Send it to a colleague; it opens ready to edit, no account needed.
Frequently asked questions
Can it draw a substance that is not in the library?
Yes. Describe the atoms and bonds, for example three carbon atoms in a chain with an oxygen double-bonded to the middle carbon. The tool places them according to valence and the main chain. You can also drag atoms from the library and click Auto-arrange.
Does the apparatus look like the textbook drawings?
Test tubes, flasks, conical flasks, beakers, burners, stands, funnels and troughs use the familiar shapes from secondary-school chemistry textbooks, with thin black lines and lightly shaded liquids that stay clear in black and white.
Why use this instead of an image from the web?
Web images often show the wrong substance or the wrong assembly and cannot be edited. Figures here follow your exact problem, every detail is editable, and the printed lines match the rest of the exam.
Can labels use subscripts and my own wording?
Yes. Type CO₂, conc. H₂SO₄, dilute HCl exactly as you want it shown. Labels can be dragged if they overlap apparatus and print clearly.
What if AI assembles the apparatus incorrectly?
Type an edit such as Collect the gas over water instead, Add a burner under the test tube, Tilt the test tube down. Or drag the apparatus directly and rotate it with the handle. Correct parts are kept.
How much is free?
Manual drawing, editing, copying and exporting are unlimited and need no account. The AI part has a daily limit for anonymous users.
Draw your first chemistry figure now
Open the tool, type a substance name or describe an experiment and watch the figure appear in seconds. No account needed.