Lift your hand in front of the camera, pinch your fingers, and a line follows your fingertip through empty space. No pen, no tablet, no headset — the camera you already own is the whole input device.
Free, no account, runs in your browser.
Free · no account · works in seconds
There is no sensor in your hand and nothing attached to it. The camera sees a picture; software finds your hand inside that picture; and the position of your fingertip becomes the tip of a pen.
Your webcam streams frames, roughly thirty a second. Nothing leaves your device — the frames are read inside the page.
Each frame, twenty-one points on your hand are located: the wrist, and every joint of every finger. That skeleton is what the software actually reasons about.
When your thumb and index fingertips come together, the pen goes down. Separate them and it lifts. The gesture is the interface — there is no button to press.
Because the software has your whole hand and not just a dot, other gestures can mean other things: pointing moves the cursor without drawing, and open-hand poses can pan or erase. That is why you can work for a long stretch without ever touching the keyboard.
Drawing in the air is not a better mouse. It is a different kind of moment, and it is good at particular things.
A hand moving through empty space with a line appearing behind it does not look like other content. Export the timelapse and the process is the post.
You can sketch a diagram while looking at your class or your camera, rather than turning your back to a board or hunching over a trackpad.
No styluses to distribute, no tablets to charge, no software for anyone to install. Everyone opens a link.
A quick shape in the air is faster than opening a design tool for a rough idea.
For some people a bare-hand gesture is easier than a precise mouse or a small touchscreen target.
This is a real reason. People smile the first time the line appears, and they show someone else.
Everything you need is already on the machine in front of you.
There is no pen to buy, charge, pair or lose, and nothing to hold — the camera tracks your bare hand, so there is no marker, glove or tag for it to look for.
No tablet, no stylus, no headset, no dongle, no subscription. A webcam and a browser tab, which you already have.
Most first sessions improve enormously with a few small adjustments.
A bright window behind you turns your hand into a silhouette. Face the light instead.
Around an arm's length works well. Too close and your hand leaves the frame constantly.
Big movements from the whole arm produce far smoother lines than small finger movements.
A gentle touch of thumb and index is enough. A hard clench curls the rest of your hand and makes tracking harder.
Long sleeves over the wrist genuinely confuse hand tracking.
Still stuck? Open the canvas and try it — the thing answers faster than reading about it does.
Try it FreeYou hold your hand up where the camera can see it and pinch your thumb and index finger together. The pinch is the pen going down, so a line follows your fingertip while you hold it and stops the moment you release. Everything else — moving the canvas, zooming, erasing — is another hand shape, so you never touch a keyboard or mouse while drawing.
None of them. A webcam is the entire hardware requirement. Headsets do this with more precision because they sense depth, but they cost hundreds to thousands; a laptop camera is already in the room and costs nothing.
Yes. It runs in the phone browser using the front camera, and it works on phones as well as laptops.
No. The hand tracking runs inside the web page on your own device. Frames are read, used to find your hand, and discarded. Nothing is uploaded and there is no account to create.
Yes — as a full-resolution image, or as a video. The video is usually the one worth keeping, because watching a drawing appear in mid-air is far more striking than the finished picture on its own.
To measure you. Hands differ in size, and the distance that counts as a pinch for one person is a resting hand position for another. Measuring your open hand and your pinch once means the threshold fits your hand instead of an average, which is the difference between a line that starts when you want it and one that stutters.
Yes. No account, no trial that turns into a subscription, no card. This matters because several apps in this category advertise as free and then open weekly billing.
Open the canvas, hold up a hand, and pinch. That is the entire setup.