Steam Deck Screen Dead-Pixel & Color Test
Free online dead-pixel and color uniformity test for the Steam Deck and any other handheld or monitor. Eight fullscreen patterns including red, green, blue, white, black, 50% gray, a horizontal gradient and a checkerboard. Detects native Steam Deck 1280×800 resolution and warns if you are running scaled, since scaling artefacts can look like stuck pixels. Gamepad-navigable for the Deck's built-in controls.
How to use
Use Desktop mode + Chrome or Firefox from Discover. Make sure you're running native 1280×800 — the screen card above will tell you.
Click a tile (Red, Green, Blue, etc.) to enter fullscreen on that pattern. Or click Run All to start from Red.
On solid colors, look for pixels of the wrong color (stuck) or black (dead). On the gradient, look for visible bands or steps.
Click anywhere or press → to advance. Esc, B-button on a gamepad, or the ✕ on the bar exits fullscreen.
Find dead pixels and check color uniformity on your Deck
Screen
Steam Deck has a 7" 1280×800 IPS panel (or 1280×800 OLED on the OLED model). Run the test in native resolution — scaling artefacts on a non-native size can look like dead pixels.
Test patterns
Eight fullscreen patterns: solid colors for spotting dead/stuck pixels, a gradient for banding, and a checkerboard for sub-pixel issues. Click a tile to start from that pattern, or Run All to cycle through them.
