You just unpacked a display
Run the short checkup while the seller return window is still open.
Run the quick checkupCheck the screen in front of you
Screen tests with no install
Use fullscreen patterns and browser timing to inspect pixels, motion, text, color, and panel behavior. No account is required, and saved checkup history stays in this browser.
Popular checks
Jump to the symptom
Each page gives you a repeatable pattern or comparison. It does not turn the browser into lab equipment.
HDR Test
Check browser HDR signals and inspect HDR-oriented highlight patterns.
Open testInput Lag Test
Compare browser reaction timing across repeated pointer or keyboard trials.
Open testGradient Banding Test
Look for visible steps or posterization in smooth gradients.
Open testResponse Time Test
Look for ghosting, overshoot, and motion blur in moving patterns.
Open testBurn-in Test
Inspect solid colors and patterns for retention-like artifacts.
Open testBacklight Bleed Test
Observe edge light and corner glow on a dark fullscreen pattern.
Open testAll 20 screen tests
Pick what you can actually see: a fixed pixel, uneven light, motion trails, unclear text, or a setup mismatch.
HDR and color behavior
HDR Test
Check browser HDR signals and inspect HDR-oriented highlight patterns.
Gradient Banding Test
Look for visible steps or posterization in smooth gradients.
Gamma Test
Compare browser gamma patterns before changing display settings.
Contrast Ratio Test
Inspect shadow detail, highlight detail, and visible clipping.
Color Temperature Test
Compare warm, neutral, and cool browser-rendered white references.
Pixels, uniformity, and panel defects
Dead Pixel Test
Use solid colors to locate pixels that remain dark, bright, or fixed.
Touch Screen Test
Trace the display to reveal areas where pointer input repeatedly drops out.
Uniformity Test
Compare visible brightness and color consistency across the panel.
Burn-in Test
Inspect solid colors and patterns for retention-like artifacts.
Backlight Bleed Test
Observe edge light and corner glow on a dark fullscreen pattern.
Viewing Angle Test
Observe color and contrast changes from off-center positions.
Motion, frame timing, and interaction
Response Time Test
Look for ghosting, overshoot, and motion blur in moving patterns.
Refresh Rate Test
Record browser frame cadence and compare it with the configured refresh rate.
Frame Skipping Test
Photograph a numbered sequence and check whether the same gap repeats.
Input Lag Test
Compare browser reaction timing across repeated pointer or keyboard trials.
Flicker Test
Use a phone camera to compare visible bands or pulsing.
Text and viewing comfort
Screen information and multi-display setup
Not sure where to begin?
Start with the job you need to finish, not a technical term.
One symptom is bothering you
Choose the closest test, reproduce the issue, and change one setting at a time.
See common symptomsYou need a record for support
Organize repeatable observations, settings, and photos into a report you control.
Build a defect reportMethod and privacy
Read the result at the right level
A test can show a repeatable visual pattern, a browser-reported capability, or browser frame timing. Use it to describe what changes by color, mode, input, or viewing position.
It cannot isolate every part of the signal chain or measure luminance, color accuracy, panel response, or display-only input lag. Those jobs need suitable instruments and a controlled method.
Checkup history and report drafts stay on this device in browser storage. Export anything you cannot afford to lose, because clearing site data also clears local records.
Practical guides
Turn an observation into a next step
Frequently Asked Questions
Everything you need to know about testing your monitor, display defects, and calibration.
What is a screen test?
A screen test is a browser-based visual check for display issues such as dead pixels, refresh-rate mismatch, text clarity, and uneven brightness. It is useful for home inspection, but it is not a lab measurement.
How do I test my monitor for free?
FreeScreenTest offers browser-based display checks for common monitor issues. Choose a test from the homepage and follow the on-screen instructions. No signup, download, or payment is required.
What is a dead pixel and can it be fixed?
A suspect pixel may remain dark, bright, or fixed on one color across several solid patterns. A browser test can document its location and appearance but cannot classify the hardware fault or determine whether a repair or return policy applies.
How do I check my monitor's refresh rate?
Use the Refresh Rate Test to record requestAnimationFrame cadence while the tab stays visible. Browser scheduling and system load affect the result, so confirm the configured signal timing in operating-system or display settings when needed.
What is backlight bleeding?
Backlight bleeding is visible light leakage from LCD monitor edges, most noticeable on black screens in dark rooms. Some glow can be normal depending on panel type and viewing angle; document severe cases and compare them with official support terms.
What's the difference between IPS, VA, and TN panels?
IPS, VA, TN, and OLED panels have different viewing-angle, contrast, and response characteristics. A browser test can show visible behavior on your own screen, but exact panel type should be confirmed from the manufacturer or model documentation.
What is the best color temperature for a monitor?
6500K is a common neutral reference point, while lower values look warmer and higher values look cooler. Use the Color Temperature Test as a visual comparison, then confirm critical color decisions with proper measurement tools.
Can I tune my monitor at home?
You can use the Gamma, Color Temperature, and Contrast Ratio tests as visual references while adjusting monitor settings. For color-critical work, use a hardware colorimeter or another measurement workflow.
What is input lag and why does it matter?
Input lag is the delay between an input and the resulting visible update. The Input Lag Test records browser reaction timing, which includes human response and system scheduling; it does not isolate display latency.
How can I tell if my monitor supports HDR?
Use the HDR Test to check browser-reported HDR behavior and view HDR-oriented patterns. Browser checks cannot certify peak brightness or full HDR performance; confirm those details with device specifications or measurement tools.