Look at text and line edges to check display sharpness.
▶ Start test · Focus
Check whether text, lines and shapes are crisp and sharp. Arrow keys switch modes. a total of 5 steps
💡 Operation tips
Click the right half of the screen to move to the next view; when the current project’s views are done it advances to the next project, and when every project is finished it exits fullscreen automatically.
Click the left half of the screen to go back to the previous view; at the very first view it stops.
After entering fullscreen, the top label and bottom buttons auto-hide after 3 seconds so you can view the screen unobstructed.
Hover in the bottom-centre of the screen for 1 second to bring the label and buttons back; move away and they hide again after 1 second.
The breathing test ends automatically after about 10 seconds.
{"mode":"focus","basePath":"/screen/","dict":{"mode":{"base":"All","purecolor":"Pixels","backlight":"Backlight","interference":"Interference","focus":"Focus","contrast":"Contrast","grayscale":"Grayscale","saturation":"Saturation","breathing":"Breathing"},"startAll":"Run the full screen check","startAllSub":"Start with the solid-color test, then work through all 8 checks in order. Click the screen or press Space to move to the next test project.","startSub":"Start test","stepLabel":"a total of {n} steps","fullscreenFail":"Could not enter fullscreen — continuing in windowed mode (patterns still display correctly).","prevView":"Previous view","nextView":"Next view","exitView":"Exit test","nextProject":"Next project","instr":{"purecolor":"Scan the screen for bright, dark or tinted (stuck) pixels. Use the arrow keys to switch colors.","backlight":"Look for light leaking from the edges and corners. Arrow keys toggle between black and gray.","interference":"Watch for moiré, streaks or related interference. Arrow keys switch patterns.","focus":"Check whether text, lines and shapes are crisp and sharp. Arrow keys switch modes.","contrast":"Assess the black-to-white gradient and tonal depth. Arrow keys flip the gradient direction.","grayscale":"Check that the gray steps are smooth with no banding. Arrow keys flip the gradient direction.","saturation":"Judge how vivid and even the saturated colors are. Arrow keys switch between colors.","breathing":"Watch the static gray screen for ~10 seconds and judge whether the brightness pulses periodically."},"colorName":{"black":"Black","white":"White","gray":"Gray","red":"Red","green":"Green","blue":"Blue","yellow":"Yellow","magenta":"Magenta","cyan":"Cyan"},"patternName":{"checkerboard":"Checkers","lines-h":"H-lines","lines-v":"V-lines","grid":"Grid"},"direction":{"left-to-right":"left to right","right-to-left":"right to left","dark-to-light":"black left · white right","light-to-dark":"white left · black right"},"focus":{"large":"Large text","small":"Small text","lines":"Thin lines","grid":"Fine grid","circles":"Circles","largeTitle":"Focus test","smallTitle":"Small-text sharpness","linesTitle":"Thin-line sharpness","gridTitle":"Fine-grid test","circlesTitle":"Circles & curves","vert":"Vertical lines","horiz":"Horizontal lines","diag":"Diagonal lines","fineGrid":"Fine grid (1px)","fineGrid2":"Ultra-fine grid (0.5px)","concentric":"Concentric circles","waves":"Wave lines","largeHint":"Check that large-letter edges are crisp, with no blur or ghosting.","smallBody1":"A paragraph for judging small-text sharpness. Look at whether the letter edges are crisp and the spacing even.","smallBody2":"The quick brown fox jumps over the lazy dog. 0123456789","smallBody3":"Smallest text — gauge readability and clarity at the minimum size."},"breathingTitle":"Breathing test","breathingEnd":"s until it ends automatically","tipsTitle":"Operation tips","tips":["Click the right half of the screen to move to the next view; when the current project’s views are done it advances to the next project, and when every project is finished it exits fullscreen automatically.","Click the left half of the screen to go back to the previous view; at the very first view it stops.","After entering fullscreen, the top label and bottom buttons auto-hide after 3 seconds so you can view the screen unobstructed.","Hover in the bottom-centre of the screen for 1 second to bring the label and buttons back; move away and they hide again after 1 second.","The breathing test ends automatically after about 10 seconds."],"phoneStartAllSub":"Start with the solid-color test, then work through all 8 checks in order. Tap the screen to move to the next test project.","phoneInstr":{"purecolor":"Inspect each view for bright, dark or tinted pixels. Tap or swipe to change color.","backlight":"Look for light bleeding around the edges and corners. Tap or swipe to toggle between black and gray.","interference":"Look for streaks, moiré or other interference. Tap or swipe to change the pattern.","focus":"Check that text, lines and grid edges are crisp. Tap or swipe to switch focus mode.","contrast":"Observe the black–white gradient and tonal depth. Tap or swipe to flip the gradient direction.","grayscale":"Check the gray ramp for smoothness and banding. Tap or swipe to flip the gradient direction.","saturation":"Judge the vividness and color accuracy of each hue. Tap or swipe to change color.","breathing":"Watch the static screen for about 10 seconds and judge whether the brightness pulses periodically."},"phoneTips":["Tap anywhere on the screen to move to the next view; when the current check finishes it advances, and exits fullscreen once all checks are done.","Swipe left to go back to the previous view; it stops at the very first view.","After entering fullscreen, the top title and bottom controls auto-hide so the screen stays unobstructed.","Touch the bottom-centre zone to bring the title and controls back; move away and they hide again.","The breathing test ends and exits fullscreen automatically after about 10 seconds."]}}
Focus & sharpness testing
The focus test shows text, lines and shapes of various sizes to assess sharpness. Good focus means crisp letter edges and fine lines with no fuzz.
What each pattern checks:
Large text: whether big letter edges are clean, with no blur or ghosting.
Small text: legibility of tiny text and distinguishing similar characters (like i/l/1, o/0).
Thin lines: whether 1 px lines stay continuous without breaks.
Fine grid: whether an ultra-fine grid is even and undistorted.
Circles & curves: whether curved edges are smooth with no jaggies.
What affects sharpness:
Use the panel’s native resolution — anything else interpolates and blurs.
Check that the OS scale factor is an integer (100%/200%).
ClearType (Windows) or font smoothing (macOS) affects text rendering.
FAQ
Why do my text edges look blurry?
The most common cause is not using the native resolution (interpolation blurs it), or a non-integer scale factor (like 125% instead of 100%/200%). Also check that ClearType (Windows) or font smoothing (macOS) is on.
How do I judge focus?
Look for crisp, ghost-free large-letter edges; legible small text; continuous 1 px lines with no breaks; and a fine grid that is even and undistorted. Smooth, anti-aliased shapes mean all is well.
Is a soft-looking monitor out of the box a hardware fault?
If it’s still blurry after confirming the native resolution and integer scaling, it may be the panel pixel layout or circuitry — contact support. But most “blur” comes from scaling or driver settings.
What does the focus test do for text workers?
Sharpness directly affects comfort in long reading and coding sessions. This tool uses large/small text, thin lines, grids and shapes to tell you whether your current resolution and scaling are optimal.
