Neutral sample
Stick drift and deadzone
Set the controller on a steady surface and do not touch either stick during the sample.
Ready for an 8-second sample.
Range and shape diagnostics
Analog Stick Circularity and Range Test
Visualize analog stick range, corners, symmetry, and circularity. Check whether your controller reaches its expected movement envelope.
- ✓ Runs in your browser
- ✓ No sign-in
- ✓ Local results
Local-only test
Connect with USB, Bluetooth, or a supported wireless adapter. Then press any controller button so your browser can expose it. Your readings are processed on this device.
Detected device
No controller detected
Gamepad API ready · waiting for input
L1
R1
L
R
Update rate— Hzbrowser-observed
Buttons—reported
Axes—reported
Mapping—browser label
Live input
Sticks and triggers
Left trigger 0%
Observed range: not sampled
Right trigger 0%
Observed range: not sampled
Full movement
Range and circularity
Rotate each stick slowly around the outer edge, then sweep the center in several directions.
Move the sticks to begin range tracking.
Input coverage
Buttons and D-pad
Press and release every available control. Analog buttons show their reported value.
No button activity yet.
Raw browser data
Axes and mapping
Use these values to spot unusual layouts. A blank standard mapping does not automatically mean the controller is defective.
View raw browser data
Connect a controller to view raw data.
Optional capability
Vibration check
Browser haptics are not available for every controller, connection method, operating system, or browser.
Connect a controller to check browser support.
Did you feel the pulse?
Private test record
Keep your result
Reports are stored in this browser. Sharing is optional and puts only the selected result in the link.
Diagnostic readings describe what this browser receives, not electrical measurements from the controller. Confirm important findings in the game or device where you plan to use the controller.
Use the test as evidence, not a pass/fail sticker.
A circularity test maps the outer path reported as you rotate an analog stick. It can reveal reduced range, uneven directions, clipped corners, or a shape that differs noticeably between the left and right sticks.
Rotate the selected stick slowly around its outer gate several times, then sweep through the center in horizontal, vertical, and diagonal directions. Smooth, deliberate movement produces a more useful map than flicking the stick quickly.
Controller firmware and operating-system drivers may normalize the raw sensor range before it reaches the browser. Use the plot to compare consistency and symmetry, not as proof of the physical gate's exact geometry.
Signals to watch
- Live two-dimensional stick path
- Observed minimum and maximum for every axis
- Directional range and symmetry checks
- Resettable capture for before-and-after comparison
Run a repeatable check.
- 01
Connect the controller and press any button so the browser can detect it.
- 02
Use the focused test panel slowly and deliberately. Watch the live values during presses, holds, movement, and release.
- 03
Repeat any suspicious result after reconnecting, then confirm it in the game or device where the controller will be used.
What a useful result looks like.
Look for repeatable behavior rather than a single momentary value. Stable, symmetric movement and clean press-and-release behavior are generally more useful signs than chasing a perfect zero.
If a result changes substantially between USB and wireless modes, browsers, or computers, the connection, driver, browser, or remapping software may be part of the problem.
Important browser-test limits
Do not force a stick beyond its physical stop.
Questions about analog stick circularity and range test
Does the trace need to form a perfect circle?
No. Controller gates, firmware normalization, and stick mechanics vary. Look for repeatable gaps, severely short directions, or abrupt flat spots instead of expecting a mathematically perfect circle.
Why do diagonal values look different?
Some devices clamp, scale, or normalize diagonal input. A game may also apply its own circular or square response curve after receiving controller data.
Can I compare two controllers with this test?
Yes. Complete the same slow rotation pattern on each device and save separate reports. Keep the connection mode and browser the same for a fairer comparison.