Gamma Test Online
Gamma affects midtone brightness. This test gives you reference patterns for judging whether gray steps look balanced.
Live screen test
Start with the real patterns.
Review midtone balance with visual gamma bands.
What it checks
Use this test when you need a clear visual answer.
Gamma Test is built for quick inspection, not lab measurement. It gives you controlled browser patterns so you can decide whether the screen needs setup, retesting, or warranty attention.
Midtones too dark
Washed-out gray response
Picture modes that alter tone
Result guide
How to read the gamma result
Start with the gamma bands pattern, then switch to adjacent patterns before making a decision. A real display problem usually stays in the same area when the pattern changes. A reflection, viewing angle shift, browser zoom issue, or temporary image setting often changes when you move your head, adjust brightness, or repeat the test after a restart.
Midtones too dark
Use this page to isolate midtones too dark under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Washed-out gray response
Use this page to isolate washed-out gray response under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Picture modes that alter tone
Use this page to isolate picture modes that alter tone under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Workflow
How to use the gamma test
Sit at your normal viewing position and use the browser at 100 percent zoom.
Compare the center gray bands and look for the point where patterns visually blend.
Adjust monitor gamma or picture mode, then repeat the brightness and contrast tests.
Use cases
Where this screen test is most useful
Photo and video work
Avoid editing midtones on a display that is visibly off.
Gaming visibility
Set dark-scene visibility without flattening the whole image.
Multi-monitor matching
Bring two displays closer before detailed calibration.
Reading the result
Practical tips before you decide
Use 100 percent zoom
Browser scaling can change the appearance of fine gamma patterns.
Avoid viewing angle drift
Laptop and TN panels can change gamma when your head moves.
Treat it as visual guidance
For exact color work, use a hardware colorimeter after this check.
Device setup
Use the same screen test across real viewing setups
The gamma test works best when the test matches the way you actually use the display. Keep the room lighting, brightness, scaling, and viewing distance close to normal, then repeat the pattern only after a setting change. This keeps the result practical instead of turning the page into a lab claim.
Desktop and laptop monitors
Use native resolution, 100 percent browser zoom, and the monitor picture mode you normally use. If you change brightness, contrast, overdrive, or color temperature, repeat the gamma pass before comparing results.
TVs, projectors, and large panels
Step back to your real viewing distance after a close inspection. Large screens can exaggerate small edge, glow, focus, or processing issues, so confirm anything suspicious with normal video, games, or desktop content.
Phones and tablets
Rotate the device if the browser supports it, clean the glass, and reduce reflections before judging the result. Some mobile browsers limit fullscreen behavior, but the same pattern sequence still helps with quick display checks.
Related tests
Continue with adjacent checks
Brightness Test
The brightness test helps you set a comfortable level while keeping near-black and near-white detail visible.
Contrast Test
Use stepped tone patterns to see whether your display keeps dark and bright details separate.
Color Banding Test
Smooth gradients reveal banding, posterization, and compression-like steps that flat color screens can hide.
Text Clarity Test
Text samples and fine lines help reveal blur, wrong scaling, subpixel issues, and overly sharp processing.
FAQ
Gamma Test questions
These answers match the visible test on this page and avoid warranty or measurement claims that depend on your specific display.
What gamma should a monitor use?
Most standard computer use targets around gamma 2.2, but this online page is a visual check rather than a meter.
Why does gamma change with viewing angle?
Some LCD panels shift tone when viewed off-axis. Keep your normal head position while testing.
Can this replace a colorimeter?
No. It is useful for a quick visual check, but hardware measurement is better for color-critical work.
Should I test gamma before brightness?
Start with brightness and contrast, then use gamma to refine midtones.
Can I use the gamma test on more than one device?
Yes. Open the same page on each monitor, laptop, phone, tablet, TV, or projector, then compare the gamma result under similar brightness and room lighting. Device browsers can handle fullscreen differently, but the visual patterns are still useful for a practical check.
Does this online gamma test replace professional calibration?
No. This page is a browser-based visual test for finding obvious display problems and setup issues. For color-critical work, brightness targets, or measured calibration, use a hardware colorimeter or professional display workflow after the visual pass.
How to Check a Monitor for Dead Pixels
A reliable dead pixel check uses fullscreen solid colors, steady lighting, and a repeatable inspection path. The goal is to separate real panel defects from dust, reflections, scaling artifacts, and temporary cable issues.
How to Test a New Monitor
A new monitor should be tested before you mount it, remove packaging, or let the return window pass. Start with panel defects, then verify uniformity, tone, text clarity, refresh rate, and real content.
Monitor Calibration Guide
Browser tests can help you set a monitor to a sensible baseline and spot obvious problems. They do not replace a colorimeter, but they make brightness, contrast, gamma, sharpness, and banding easier to judge before hardware calibration.
Ready to inspect the full screen?
Open the fullscreen pattern and move through the test slowly.