Screen Center Finder
Mark the exact center of your display. Go full screen to draw a precise crosshair, full-width and full-height center lines, corner-to-corner diagonals, and an optional rule-of-thirds grid over a clean surface — then read out the exact center pixel and your screen resolution.
Preview — go full screen to mark your real display
Put a crosshair at dead center to line up a camera or facecam for streaming and calls.
Read the exact center pixel to place a sticker or tape cross for mounting and calibration.
Use the center lines and diagonals as a target to square up a projected image.
What the center of the screen is
The center is the single point exactly halfway across and halfway down the display — for a 1920 × 1080 screen that is the pixel at 960 × 540. It is easy to eyeball but hard to hit precisely, and small offsets are visible once you line up a camera, a physical marker, or a projected image against it. This tool draws several guides that all meet at that point so you can trust the mark rather than guess it.
Where a center marker helps
- Aligning a webcam or phone so your face or subject sits dead center in frame for streaming and video calls.
- Placing a physical mark (a sticker or tape cross) at the true middle of a monitor or TV for mounting, calibration, or repair.
- Using the crosshair as a fixed reference point when framing screenshots, drawings, or on-screen measurements.
- Squaring up a projector image so its center lands where you expect, using the diagonals and center lines as a target.
How the center is computed
The center is simply half the width and half the height. The tool reports two things: the drawing area it measures in CSS pixels (what the browser lays out), and your screen resolution from the operating system. On a high-DPI display these differ — a Retina laptop may report a 1512-pixel-wide layout while the panel has far more physical pixels — but the midpoint is the same relative point either way. The guides are painted on a canvas scaled by your device pixel ratio, so the crosshair stays crisp and sits on the true half-pixel rather than blurring across two.
A note on multiple monitors
The guides and readout describe the display this browser window is on, not your whole desktop. If you span several monitors, move the window onto the screen you want to center before going full screen. Each screen has its own resolution and therefore its own center point, so check the readout after switching displays.