Display Test - ApexCheck

Comprehensive display testing for resolution, refresh rate, dead pixels, and color accuracy to ensure your monitor is working properly.

Display information

Use these browser-visible values to confirm viewport size, screen size reported to the page, device pixel ratio, and panel orientation before deeper testing.

CSS viewport

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Screen API size

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Device pixel ratio

1

Color depth

0 bits

Orientation

Landscape

Resolution Test

Current Resolution

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Refresh rate estimate

Sample animation frames in the browser to estimate the display refresh rate seen by this tab.

Latest estimate

Not measured yet

This estimate reflects browser animation timing, not a guaranteed panel specification. Run it a few times and compare the pattern instead of trusting one number.

Dead Pixel Test

Select a color and enter full screen. Carefully check the entire display for any stuck bright or dark pixels.

Screen Color Test: Grayscale, Gradients & Uniformity

Test grayscale separation, smooth gradients, shadow detail, highlight detail, RGB transitions, and panel uniformity with full-screen patterns.

Grayscale steps

Every block should be distinct, from pure black through neutral gray to white.

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Overview

Our display test tool provides a comprehensive evaluation of your screen's performance, helping you understand various technical specifications. With an easy-to-use interface, you can quickly test your monitor's resolution, refresh rate, dead pixels, and color accuracy.

- Real-time display basic information - Accurate resolution and refresh rate detection - Multi-color dead pixel detection - Professional color accuracy and grayscale testing - Full-screen detection mode support - Compatible with various display types
1. Open the display test page, basic information will be shown automatically 2. Click "Test Now" to view detailed resolution information 3. Adjust the refresh rate slider and observe screen flickering 4. Use dead pixel detection and switch colors to find screen defects 5. View grayscale and color gradient tests to evaluate display performance 6. Click "Reset Detection" to restart testing if needed
This tool uses JavaScript screen APIs and CSS animation technology, running directly in your browser without any software installation. Test results are based on screen information provided by the browser and visual tests, serving as reference indicators for display performance.
- Quality testing after purchasing a new monitor - Regular checks for display performance changes - Gamers optimizing display settings - Designers evaluating color accuracy - Office users ensuring display quality
Q: Are the test results accurate? A: Test results are based on screen information provided by the browser and can be used as a reference, but professional testing is recommended for hardware tools. Q: Which browsers are supported? A: Supports all modern browsers including Chrome, Firefox, Safari, and Edge. Q: How long does dead pixel detection take? A: Detection time depends on your carefulness; observe each color for 10-15 seconds. Q: Can multiple displays be tested? A: Currently only the main display is supported; multi-display support will be added later.

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