Controller D-Pad Tester & 8-Way Directional Test Online
Inspect individual Up (B12), Down (B13), Left (B14), and Right (B15) switch states alongside a 3×3 8-way directional grid to verify cardinal presses and diagonal chord transitions.
Plug in your controller & press any button, or test using keyboard emulation / auto demo.
Tactile directional switch verification
Test all buttons, sticks, triggers, deadzones, and developer telemetry together.
Overview & Diagnostic Methodology
Use the 3×3 directional grid and the four B12–B15 switch badges below to test individual cardinal presses, two-switch diagonal corners, and smooth thumb rolls. If your controller uses a non-standard DirectInput/HID layout where the D-pad is reported as a POV hat axis instead of buttons B12–B15, the panel clearly flags "Raw HID (Unmapped)" rather than showing false switch states.
How B12–B15 D-Pad Switches, Diagonal Chords, and POV Hat Axes Work
How Standard B12–B15 Mapping Represents 8 Directions: Even when a controller features an 8-way circular dish on the outside (such as the Xbox Series X|S controller), it only has four electrical switches underneath the D-pad: Up (Button 12), Down (Button 13), Left (Button 14), and Right (Button 15). There are no separate physical switches for the diagonals. Instead, pressing Down-Right physically rocks the plastic D-pad over its central pivot so that both the Down switch (B13) and the Right switch (B15) close at the same time. The 3×3 grid above lights up a diagonal corner only when both corresponding cardinal badges read ON simultaneously.
Diagnosing Dropped Diagonals vs. Accidental Cardinal Bleed: Two distinct mechanical problems show up clearly when watching the B12–B15 badges. First, if you press a diagonal corner or roll from Down to Right and the grid jumps straight from Down (B13) to Right (B15) without ever lighting "Down-Right", one of the two conductive silicone pads or metal snap-domes requires too much force to stay closed during the roll. Second, if pressing straight Left (B14) or Right (B15) accidentally flickers Up (B12) ON—a well-known quirk on early Nintendo Switch Pro Controllers and worn membrane pads—the internal pivot post or silicone contact ring is allowing adjacent contacts to bridge under side-to-side pressure.
Why Non-Standard DirectInput / POV Hat Controllers Show "Raw HID (Unmapped)": This tool specifically inspects standard buttons B12 through B15. However, many generic USB PC gamepads, arcade sticks in DirectInput mode, and flight sticks report Gamepad.mapping === "". On those devices, the USB HID descriptor often encodes the D-pad as a single 8-position "POV Hat Switch" written to a high axis channel (frequently axes[9], where each direction is represented by a specific decimal step between -1.000 and +1.000) or assigns the D-pad to different button indices. Because this D-pad grid does not automatically decode non-standard POV hat axes, it displays "Raw HID (Unmapped)" whenever mapping is not "standard"—preventing you from mistaking an unmapped POV axis for four broken D-pad switches.
Measurement & Telemetry Classification
Technical distinction between direct hardware reads, client-side algorithms, and educational thresholds.
- Digital pressed boolean states for standard Gamepad API indices buttons[12] (Up), buttons[13] (Down), buttons[14] (Left), and buttons[15] (Right).
- Active Gamepad.mapping mode ("standard" vs. raw HID "") reported by the browser.
- Derived 8-way directional state (Up, Down, Left, Right, Up-Left, Up-Right, Down-Left, Down-Right, or Center) from simultaneous B12–B15 switch combinations.
- Why diagonal inputs require two switches (for example, Down B13 + Right B15) to stay closed at the same time.
- Why non-standard DirectInput/HID gamepads often encode the D-pad as a single POV hat-switch axis (such as axes[9]) rather than buttons B12–B15.
- How worn silicone conductive pads or overly sensitive membrane skirts cause dropped diagonals or unintended vertical presses.
Key Diagnostic Parameters
How to Test Step-by-Step
- 1Connect your controller and press any button so the browser activates its Gamepad API slot.
- 2Confirm that the top status pill reads "State: Center" (not "Raw HID (Unmapped)") before starting.
- 3Press Up, Down, Left, and Right one at a time, verifying that the matching badge—Up (B12), Down (B13), Left (B14), or Right (B15)—switches cleanly from OFF to ON and back to OFF when released.
- 4Press each of the four diagonal corners (Up-Left, Up-Right, Down-Left, Down-Right) to confirm that both adjacent cardinal switches stay ON together without dropping out.
- 5Slowly roll your thumb from Down through Down-Right to Right (and Down through Down-Left to Left) to check whether the diagonal corner engages smoothly during quarter-circle motion inputs.
What This Test Verifies
In W3C Standard Gamepad mode, directional pad switches map to buttons[12] (Up), buttons[13] (Down), buttons[14] (Left), and buttons[15] (Right), with diagonal headings derived from simultaneous adjacent switch closure. Non-standard DirectInput devices (mapping: "") often encode the D-Pad as a single quantized POV hat axis instead of B12–B15.
Defines canonical B12–B15 directional switch positions for standard gamepads.
Explains how browsers indicate standard button remapping versus raw device layouts.
Frequently Asked Questions
Why does the D-Pad panel say "Raw HID (Unmapped)" and show "—" on B12 through B15?
Your browser enumerated the controller with a non-standard HID mapping (mapping: "") rather than the W3C "standard" layout. Many DirectInput controllers, older USB adapters, and flight sticks expose the D-pad as a single POV hat-switch axis (often axes[9]) or on different button numbers instead of B12–B15. Because this tool only decodes standard B12–B15 buttons, it flags "Raw HID (Unmapped)" so you can inspect the raw axis and button streams in the Gamepad Tester.
Why does a diagonal corner only light up when two B12–B15 switches are ON at the same time?
Standard controllers only have four physical switches under the D-pad: Up (B12), Down (B13), Left (B14), and Right (B15). Diagonal directions like Down-Right are created mechanically by pressing Down and Right simultaneously. Watching the four switch badges beneath the 3×3 grid shows you which of the two switches is failing to close if a diagonal drops out.
Why does pressing Left or Right on my D-pad occasionally trigger Up (B12) at the same time?
On one-piece cross D-pads with a short central pivot or wide conductive rubber contacts, pressing firmly on the outer edge of Left or Right can tilt the entire cross enough to brush the Up contact pad. You can confirm this by holding Left (B14) or Right (B15) and rocking your thumb slightly upward while watching whether the Up (B12) badge flickers ON.
Can this tool detect Simultaneous Opposite Cardinal Directions (Up+Down or Left+Right) on a leverless controller?
Only if the leverless controller sends unfiltered opposite button presses to the PC. Most tournament leverless controllers (Hit Box, Razer Kitsune, Haute42) clean Up+Down and Left+Right conflicts inside their own onboard firmware before sending USB packets to the computer, so the browser will only see the cleaned output (such as Neutral or Up).