Screen test online with Tech-Play’s free Monitor Tester. Check your display for dead pixels, stuck pixels, color issues, uneven brightness, refresh rate, sharpness, and backlight bleed. Choose a test, enter fullscreen mode, and inspect your monitor, laptop, tablet, or smartphone screen—no installation or account required.
Screen & Monitor Tester
Check your display for dead pixels, color problems, gradients, sharpness, backlight bleed, refresh rate and more directly in your browser.
Your Display
Values detected automatically by your browser.
Monitor Tests
For the best results, clean your screen first and run the tests in fullscreen mode.
Dead Pixel Test
Display solid red, green, blue, white and black screens to spot dead or stuck pixels.
Color Test
Check primary and secondary display colors for unusual tinting or uneven reproduction.
Gradient Test
Look for color banding, abrupt transitions or other problems in smooth gradients.
Grayscale Test
Check whether dark and light shades remain distinguishable across the entire display.
Sharpness & Text
Test fine text, one-pixel patterns and display sharpness at different sizes.
Backlight Bleed
Use a completely black image in a dark room to inspect edge glow and uneven backlighting.
Screen Uniformity
Inspect a neutral gray surface for brightness or color differences across the panel.
Viewing Angle
Move your head left, right, up and down and watch for color or contrast changes.
Motion Test
Watch a moving high-contrast object for ghosting, smearing and motion blur.
Pixel Pattern
Display an ultra-fine black and white pattern for scaling and pixel sharpness checks.
Refresh Rate Test
Estimate your monitor refresh rate and display a simple fullscreen motion indicator.
White Screen Test
Inspect white uniformity, panel discoloration, dirt, dark spots and brightness consistency.
How to test your monitor
- Clean your screen so dust is not mistaken for dead pixels.
- Set your monitor to its normal/native resolution.
- Use the Dead Pixel Test and inspect every part of the screen on red, green, blue, white and black.
- Run the Gradient Test and look for obvious steps or bands instead of smooth transitions.
- Use Backlight Bleed in a dark room with your normal monitor brightness.
- Run the Motion Test to look for visible trailing, ghosting or excessive blur.
About the Tech-Play Screen & Monitor Tester
The Tech-Play Screen & Monitor Tester is a free online screen test tool designed to help users inspect computer monitors, laptop displays, tablets, and smartphone screens.
Our browser-based display testing tools include:
- Dead Pixel Test: Identify potentially dead or stuck pixels using solid-color backgrounds.
- Backlight Bleed Test: Check LCD monitors for uneven lighting near the edges and corners.
- Grayscale Test: Examine how your display reproduces different gray levels.
- Color Test: Inspect primary and secondary colors for obvious visual inconsistencies.
- Refresh Rate Test: Estimate your browser's animation refresh rate.
- Gradient Test: Identify visible color banding or irregular transitions.
- Sharpness Test: Check text clarity and fine patterns.
- Motion Test: Look for visible ghosting, smearing, and motion blur.
All display tests run directly in your web browser without additional software, registration, or external APIs.
How Accurate Are Online Screen Tests?
Online screen tests can help identify many visible display problems. However, browser-based results depend on several factors, including:
- Browser rendering and color management
- Operating system display scaling
- Graphics card settings and drivers
- Monitor brightness and contrast settings
- Ambient lighting and viewing angles
- Display technology, including LCD, OLED, and Mini-LED
Our tools are intended for visual inspection and basic troubleshooting. They cannot replace professional display calibration, certified testing equipment, or laboratory measurements.
Important Safety Information
While using the Screen & Monitor Tester, we recommend taking the following precautions:
- Avoid displaying static test patterns for extended periods, particularly on OLED screens.
- Keep screen brightness at a comfortable level.
- Take breaks if bright colors or high-contrast patterns cause discomfort.
- Stop the test if you experience eye strain, headaches, or other discomfort.
- Use fullscreen mode only when necessary.
Frequently Asked Questions
Is the Tech-Play Screen Test free?
Yes. All screen and monitor tests are completely free and require no registration or software installation.
Can I check my monitor for dead pixels?
Yes. The dead pixel test displays several solid-color backgrounds that can help reveal dead or stuck pixels.
Does the screen tester work on mobile devices?
Yes. The tester works on many smartphones and tablets, although fullscreen capabilities and browser behavior vary by device.
Can this tool measure my actual monitor refresh rate?
The tool estimates browser animation frequency. This may approximate your display refresh rate but does not independently verify the monitor's hardware configuration.
Can the screen tester repair dead pixels?
No. The tester can help identify potential pixel defects but cannot physically repair them.
Does the tester collect information about my monitor?
The tool reads basic information exposed by your browser, such as screen dimensions, pixel ratio, and color depth. The tests themselves run locally in your browser. Other site services, including analytics and advertising, are governed by Tech-Play's applicable privacy policy.
Screen & Monitor Tester – Terms of Use and Disclaimer
Last updated: October 12, 2026
1. Description of Service
The Tech-Play Screen & Monitor Tester, available on tech-play.net, provides free browser-based display testing tools, including dead pixel detection, backlight bleed inspection, grayscale testing, color testing, sharpness testing, and refresh rate estimation.
All tests use browser technologies to display colors, patterns, and animations for visual screen inspection.
2. Disclaimer and Limitations
The tools and information provided are intended for general informational and diagnostic purposes only.
Results do not constitute professional quality inspection reports, certified measurements, expert assessments, or legal evidence of display defects.
Test accuracy and appearance may vary depending on browser behavior, operating system configuration, graphics processing, monitor settings, and environmental conditions.
To the extent permitted by applicable law, the tools are provided without guarantees of accuracy, completeness, or fitness for a particular purpose.
Nothing in this disclaimer limits any mandatory rights or liabilities that cannot legally be excluded.
3. User Responsibility and Device Safety
Users should exercise reasonable care when operating display tests.
Prolonged display of static images, especially on OLED screens, may contribute to image retention or burn-in. Bright test patterns may also cause eye discomfort.
We recommend limiting test duration, using comfortable brightness levels, and following the display manufacturer's recommendations.
4. Intellectual Property
Unless otherwise indicated, original text, design elements, and software implementations published as part of the Tech-Play Screen & Monitor Tester are protected by applicable intellectual property laws.
Unauthorized commercial reproduction or redistribution of protected content may require permission from the relevant rights holder.
5. Changes to the Service
Tech-Play may update, modify, or discontinue individual testing tools and related content.
This disclaimer may also be revised as the service evolves.
For additional information, please refer to the website's general legal notices and privacy policy.