This drawing tablet test checks the things that make a tablet feel right or wrong: pressure, tilt, jitter, how far the pen lands from where you aim, and whether the pen reaches every part of the screen. Draw on the pad for pressure and tilt, trace the ruler line for jitter, then run the full screen area and offset check, which puts nine targets across your screen and measures each tap in pixels. It works as a pen tablet test for Wacom Intuos, One and Cintiq, Huion, XP-Pen, Gaomon and other graphic tablets, both tablets without a screen and pen displays, plus iPad with Apple Pencil.
How to test a drawing tablet
- Install the driver from your tablet maker and connect the tablet straight to the computer. A pen display needs its USB lead plugged in as well as the video cable.
- In Pressure and tilt, draw strokes from a light touch to a firm press. The line should widen smoothly and the tilt dial should follow the pen.
- Switch to Line jitter, lay a ruler along the dashed line and draw slowly along it.
- Switch to Area and offset and choose your kind of tablet. Tap the center of each yellow target with the pen tip. On a pen display, look at the nib, not the cursor. On a tablet without a screen, guide the cursor onto each target.
- If the pen cannot get to a target, press It cannot reach this one. The result marks it in orange.
- Press Copy results for a report you can send to the maker's support team.
What the results mean
| Readout | What it tells you | Normal result |
|---|---|---|
| Pressure | How hard the nib presses, from 0 to 100% | Smooth ramp from near 0% to 100% |
| Pressure steps | How finely pressure reaches the browser | About 1,024 levels on Windows |
| Tilt | The pen's angle left and right (X) and toward you (Y) | Follows the pen up to about 60°, on pens with tilt |
| Report rate | Pen updates per second | About 130 to 300 Hz when the browser passes raw samples |
| Line jitter | Sample to sample wobble on a slow ruler line | Under 0.15 px is clean, over 0.4 px is visible |
| Offset (pen display) | Distance from each target's center to where the nib landed | Under 3.5 px on average after calibration |
| Area (tablet without a screen) | Whether the pen can reach every target | All 9 targets reached |
The tablet is not detected or the pen does not move the cursor
- Use a USB port on the computer itself, not a hub or keyboard port, and the original cable. Some spare cables only carry power.
- On a pen display, check that the USB lead is connected. The picture travels over the video cable, but the pen signal travels over USB.
- Uninstall every tablet driver, including old ones from other brands, restart, and install the newest driver from Wacom, Huion or XP-Pen. On a Mac, allow the driver under Privacy & Security, in Accessibility and Input Monitoring.
- Check the pen. Most current Wacom, Huion and XP-Pen pens draw their power from the tablet and need no battery, so a dead cursor there points to the tablet or driver. Bluetooth tablets need charging and pairing.
- If Windows shows an unknown device when you plug the tablet in, follow the usb not recognized fixes.
The pen works but the line never changes width
The pen is moving the cursor but no pressure arrives, which on Windows almost always means Windows Ink is off. Turn on Use Windows Ink in Wacom Tablet Properties, Enable Windows Ink in the Huion driver or Windows Ink in the XP-Pen driver, then reload this page. The pen pressure test page covers every cause and the settings for Photoshop, Krita and Clip Studio Paint.
The pen lands away from where you aim
On a pen display, the cover glass sits a little above the picture, so the line appears slightly away from the nib. This is called parallax, and it grows toward the edges and when you look at the screen from an angle. The area and offset check measures it at nine points.
- Calibrate. Wacom pen displays have a Calibrate tab in Wacom Tablet Properties, and the Huion and XP-Pen drivers have a calibration button for their displays. Pens built into Windows laptops calibrate in Control Panel, Tablet PC Settings, Calibrate, Pen input. Sit in your normal drawing position and look straight at each target.
- Check the mapping. A large offset that grows across the screen means the pen display is mapped to the wrong monitor or stretched across all of them. Map it to the pen display only.
- Check scaling. Some older drivers place the pen wrong when two monitors use different display scaling. Update the driver, or give both monitors the same scale.
Run the check again after each change. An average under 3.5 px with the worst corner under about 6 px feels accurate in drawing apps.
The pen cannot reach part of the screen
A tablet without a screen maps its whole drawing area to your screen. If the cursor cannot get to a target:
- More than one monitor. The tablet area is spread across all your screens. Set the screen area in the Wacom Mapping tab, or the monitor in the Huion and XP-Pen work area settings, to the monitor you draw on.
- A partial screen area. A screen area set to a portion of the screen leaves the rest out of reach. Set it to the full monitor.
- Rotation. Left-handed mode turns the tablet area around. Check that the orientation matches how the tablet sits on your desk.
On a pen display, a target the nib cannot reach usually means the display runs at a resolution that does not match the driver's mapping. Set the pen display to its native resolution, which the screen resolution test shows, then map the pen to it again.
Lines are wobbly or jittery
Draw along the ruler line slowly with a real ruler. Jitter above 0.4 px usually comes from electrical noise: move chargers, power bricks and speakers away from the tablet, use a rear USB port and the original cable, and try a laptop on battery. Pen displays often show more jitter near the edges of the glass. Light jitter is normal on budget tablets, and the smoothing settings in drawing apps hide it.
Strokes appear late
Windows delays the start of a stroke while it checks for press and hold. Open Control Panel, then Pen and Touch, select Press and hold, press Settings and untick the right-click option. A pen display also adds the delay of its own screen, which the input lag test measures.
Checking the pen display screen
The display half of a pen display is a monitor. Check it for dead or stuck pixels with the dead pixel test, and for uneven backlight and color with the screen test. If your pen display also takes finger input, the touch screen tester checks the touch layer.
What this test cannot measure
Offsets are in screen points, not millimeters, because a browser does not know the size of your screen's pixels. The browser receives pressure after the driver's pressure curve, so it cannot show force in grams. Express keys, touch rings and dials work through the keyboard, not the pen. Delay between nib and line in milliseconds needs a high speed camera.
Drawing tablet test questions
How do I know if my drawing tablet is working?
Draw on the pad with the pen. A working tablet lights Pen seen, the line widens as you press harder, and the pressure chart rises smoothly from near 0% to near 100%. Then run the area and offset check: the pen should land within a few pixels of every target and reach all nine.
Why is my pen offset from the cursor on my pen display?
The glass sits a little above the picture, so the line appears slightly away from the nib, most at the edges. Calibrate the display in the tablet driver while sitting in your normal drawing position, and check that the tablet is mapped to the pen display only, not to every monitor.
Why can't my pen reach the edges of the screen?
The tablet is mapped to more than one monitor, to part of the screen, or to the wrong display. In the driver, set the screen area or work area to the monitor you draw on, then run the area check again.
Do I need Windows Ink on for this test?
Yes, on Windows. Browsers read pen pressure through Windows Ink, so with Windows Ink off the pen works like a mouse and the line stays one width. Turn it on in the tablet driver and reload the page.
Why is my drawing tablet not detected?
Plug it into a port on the computer itself with the cable that came with it, since some cables only carry power. A pen display needs its USB lead connected as well as the video cable. Then remove every old tablet driver, restart, and install the newest driver from the maker's site.
Can I test an iPad with Apple Pencil here?
Yes. Open the page in Safari for pressure, tilt and jitter, and run the area and offset check as a pen display. Apple Pencil (USB-C) has no pressure sensing, so its lines stay one width.