We built the controller check we couldn't find

Why we built it

It started with an aim that kept drifting to the left during a ranked match. The stick sat at rest, untouched, yet the character on screen kept walking. The real frustration was not the drift itself. It was having no quick way to know whether the fault lived in the game, the settings, or the worn hardware under the thumb.

The tools that promised to settle the question were rough to use. Pop ups covered the screen. Some asked for an account before showing a single button press. Others pushed a download that led nowhere useful. So we made the page we wished had existed that night. Open it, press any button, and see the controller respond at once.

What began as a quick personal fix turned into something a lot of people seemed to need. Streamers wanted it on screen for their viewers. People returning faulty pads wanted proof for a warranty claim. We kept refining it, and that is the tool you use today.

What it actually does

At heart it is a live mirror of your gamepad. It reads input through the Gamepad API already built into modern browsers, so there is nothing to install and no driver to chase down.

See every input as it happens

Press a button and it lights up. Move a stick and the position updates instantly. Squeeze a trigger and watch the pressure climb from rest to full. It works with Xbox, PlayStation DualSense, Switch Pro, 8BitDo, and almost any standard controller over USB or Bluetooth.

Catch faults before they cost you

The viewer goes past a simple display. It flags stick drift the moment a resting stick reports movement it should not. It lets you tune a deadzone and feel the difference. It tests both rumble motors so you can tell a dead one from a healthy one, and it reports your polling rate so you know how often the controller is really talking to your computer.

Drop it straight into your stream

The background stays transparent, so you can paste the page address into OBS or Streamlabs as a browser source and your audience sees every input alongside the game. When you are done, export a timestamped log as a text file, which is useful evidence if you ever file a hardware claim.

What we stand for

A tool that touches your hardware should earn your trust on the first visit. These are the rules we hold ourselves to, and they are not going to change.

Built for people who trust their gear

Plenty of different people land here for the same reason. A player checks a new pad before a competitive session. A streamer wants viewers to follow every move during a fast paced game. A speedrunner proves a clean run with no missed inputs. And anyone holding a controller that feels slightly off can find out, in under a minute, whether it is worth keeping, repairing, or returning.

Where we are headed

We treat this as a living project rather than a finished one. The plan is steady and unglamorous. Support more controllers as they arrive, sharpen the diagnostics so faults are even easier to spot, and add focused companion tools for the people who asked for them, all while keeping the core promise intact. Free to use, private by default, and clean enough that it stays out of your way.