Draw here — press harder for a thicker line
- Pointer type
- -
- Tilt X
- -
- Tilt Y
- -
- Twist
- -
- Barrel pressure
- -
- Contact size
- -
- Report rate
- -
- Pressure seen
- -
- Buttons
- -
A mouse always reports pressure 0.5 while a button is down — that is not a real pressure. Fingers usually report 0 or 0.5 too, unless the screen can feel force.
About the pen pressure test
Your drawing app does not react when you press harder? This pen pressure test shows what your pen, stylus or drawing tablet really sends to the browser — before you blame the app.
Draw in the box. The line gets thicker when you press harder, and its colour goes from blue (light) to red (hard). Next to it you see the live pressure from 0 to 1, the tilt of the pen, the twist, the barrel pressure, the contact size, which buttons are down and the report rate in Hz. A graph shows your pressure over the last five seconds.
It works with pen tablets, pen displays, tablets with a stylus and touch laptops with a pen — for example a Wacom, XP-Pen or Huion tablet, an Apple Pencil, a Surface Pen or an S Pen. Nothing is sent anywhere.
Features
- A line that follows pressure — press harder for a thicker line, coloured from blue to red
- Live pressure — a big number from 0 to 1 and a bar, for every sample the pen sends
- Pressure graph — the last 5 seconds as a line, to see smooth curves or sudden steps
- Tilt, twist and barrel pressure — with a tilt dial that leans the way the pen leans
- Report rate — how many samples per second reach the browser
- Honest about "fake" pressure — the page tells you when only 0, 0.5 or 1 come in (a mouse, or a pen without pressure)
- Eraser end — the back of the pen erases, when your pen has one
- Save your drawing — download it as a PNG with one click
What each value means
| Value | Range | What it tells you |
|---|---|---|
| Pressure | 0 – 1 | How hard the tip presses. 0 = not touching |
| Tilt X | −90° – 90° | How far the pen leans to the left (−) or right (+) |
| Tilt Y | −90° – 90° | How far the pen leans away from you (−) or towards you (+) |
| Twist | 0° – 359° | How far the pen is turned around its own axis (only a few pens) |
| Barrel pressure | −1 – 1 | A wheel or squeeze sensor on the pen body (only a few pens) |
| Contact size | px | How big the touching area is (mostly for fingers) |
| Report rate | Hz | Samples per second; pens often send far more than the screen shows |
| Pressure seen | lowest – highest | The range and the number of different values seen so far |
Values a pen cannot sense stay at 0. That is normal: most pens have no twist or barrel sensor, and many have no tilt.
Pressure does not work? Check this
- The page says "Mouse" while you use a pen — the tablet works in mouse mode. Open the tablet driver settings. On Windows, many drivers have a Windows Ink option; browsers need it on to get pressure
- Only 0 or 1 comes in — update or reinstall the tablet driver, then restart the browser
- Pressure works in one app but not here — try another browser; Chrome, Edge, Firefox and Safari all support pen pressure in current versions
- On a phone or tablet — fingers usually send no pressure. Use the stylus that came with the device
- Thin lines at the start of each stroke — that is normal: the first sample often has very low pressure
Why a mouse shows 0.5
The web standard says: a device that cannot sense pressure reports 0.5 while a button is pressed and 0 when not. So a mouse always shows 0.5, and the line keeps the same width. The page names this case, so it is not mistaken for a working pen.
Frequently asked questions
How do I test my pen pressure?
Draw slowly in the box and press lightly, then harder. The number, the bar and the line width should change smoothly. The info line says "Pen pressure works" when many different values come in.
Why does my pen show only 0.5?
The browser does not get pressure from your pen, so it reports 0.5. Usually the tablet is in mouse mode or a driver setting (like Windows Ink) is off. Check the driver settings and try again.
Does tilt work with every pen?
No. Only pens that sense tilt send it; the others stay at 0°. Many pen tablets and pen displays support tilt.
What is a good report rate?
Many pens send 120 to 240 samples per second or more. A higher rate gives smoother lines in fast strokes. The number shown is what reaches the browser.
Can I save my test drawing?
Yes. After you draw, press Download drawing (PNG). The picture has a white background.
Is anything recorded?
No. Everything stays on your device. Your line width and ink choice are remembered in this browser.
Related tools
- Touch Screen Test — every finger with its number and a dead zone grid
- Online Whiteboard — draw and write with pen pressure
- Signature Maker — draw your signature and save it
- Mouse Test — test mouse buttons, the wheel and double clicks
- Screen Test — find dead pixels on a pen display
How to use it
- Connect your pen tablet, or take the stylus of your device
- Draw in the box — press lightly, then harder, and watch the line get thicker
- Read the pressure, the tilt dial and the report rate on the right
- Watch the graph: a smooth curve means the pressure works well
- Tilt and turn the pen to check Tilt X, Tilt Y and Twist
- Press Clear to start again, or Download drawing (PNG) to keep it
