This visual check is useful when setting up a monitor, inspecting a second-hand screen, or trying to work out why text looks soft or uneven. Before you begin, sit at your usual viewing distance and check browser zoom and operating-system scaling so the test reflects your everyday setup.
How to use Text Clarity Test
- Select an option in Pattern mode: Text, Vertical alternating lines, Horizontal alternating lines, or Checkerboard. Text shows several sizes to compare; the other modes display alternating patterns.
- Select Start Test or Fullscreen to view the test in fullscreen. Look at the text and patterns from your normal viewing distance, and check the screen beyond just its center.
- Use Previous and Next to move through the patterns. You can also press Left or Right. In fullscreen on a phone, tap the left or right half of the screen to go back or forward.
- Press Space for automatic mode. If reduced motion is enabled, the patterns remain manual. To return to the initial test state, select Reset or press R.
- To leave fullscreen, press Escape or select Exit fullscreen. On phones, an Exit button stays visible while fullscreen is active.
When to use it
- Checking a new monitor before the return period ends: Compare the text and patterns while you still have time to decide whether the display works for you.
- Inspecting a used monitor before buying: Look for areas where text or patterns appear visibly different from the rest of the screen.
- Comparing display settings: View a pattern, change one setting outside the test, then compare again under the same conditions.
- Investigating fuzzy interface text: Compare the available text sizes to see whether the softness is noticeable at different sizes.
- Checking browser zoom and system scaling: Confirm both before assessing text at the setup you expect to use every day.
- Looking for visible unevenness: Use the alternating lines and checkerboard to check whether the pattern looks consistent across the panel.
- Choosing a comfortable text setup: Compare the sizes as a visual reference while considering what feels easy to read during normal use.
Tips for a useful comparison
Keep your viewing distance, browser zoom, and operating-system scaling the same when comparing patterns or settings. Change one display setting at a time so you can tell what may have affected the appearance. If a bright pattern causes discomfort, stop the test.
Text Clarity Test uses browser antialiasing and system fonts, so the way letters look can vary with the browser and computer. For a separate visual check of edge definition and detail, try the Sharpness Test.
| Pattern mode | What to look at |
|---|---|
| Text | Compare the appearance of text at several sizes. |
| Vertical alternating lines | Look for visible changes across the screen. |
| Horizontal alternating lines | Check whether the pattern looks consistent from top to bottom. |
| Checkerboard | Observe how clearly the alternating squares appear across the display. |
Limits of Text Clarity Test
This is a visual comparison, not a calibrated measurement of text sharpness or overall display quality. Browser backing pixels do not guarantee a one-to-one mapping to physical panel pixels, so the same screen can look different with another browser, system font, or scaling setup.
The patterns can help you notice visible differences, but they do not identify the cause or repair a display problem. If an issue persists during normal use, compare with another device or display source; contact the seller or manufacturer for hardware advice.