With the 7P Tablet Tester browser-based tool you can test out the basic features of your tablet. This is useful for troubleshooting.
Click this link to try the tool: 7P Tablet Tester
This tool collects no data, uses no cookies, and does not save your images.
Can draw with pen, mouse, and touch (if your tablet supports touch)
Pen drawing features
Pressure affects size of brush
Tilt - Not yet implemented
Show current numeric values for position, pressure, tilt, etc. - Not yet implemented
Save canvas as PNG file
Clear canvas
Windows
Pen API:
Needs Windows Ink to be enabled in the tablet driver.
If using WinTab, no pressure is supported.
Chrome - WORKS
Firefox - WORKS
MacOS
Safari - yet to be tested
Chrome - WORKS
Linux
Chrome - WORKS
Firefox
Wayland - WORKS
X11 -
use env MOZ_USE_XINPUT2=1 firefox
to make it work
more info on what's going on with the X11 issue:
iPadOS
Safari - WORKS
Android
Chrome - WORKS
The entire source code is on the github repo (https://github.com/TheSevenPens/HtmlTabletTester). I encourage you to look through it and fork and modify it for your needs.