About the site

About FreeScreenTest

FreeScreenTest is a free collection of 20 screen tests and reference guides for monitors, laptops, phones, tablets, and TVs. You can check for dead pixels, backlight bleed, burn-in, motion blur, refresh-rate problems, banding, and color issues directly in your browser, with no account and nothing to install.

What you can do here

Check a new screen while you can still return it. The quick checkup walks through pixels, uniformity, and retention in a few minutes, and the monitor testing guide explains a full inspection.
Work out what is wrong with a screen you already use. Every test page explains the problem it shows: what causes it, which settings affect it, and how to fix or reduce it. Start from the symptom on the home page.
Prepare evidence for a return or warranty claim. Saved results and your own photos can be combined in the defect report builder and exported as a PDF.
Understand specifications before you buy. The guides cover panel types, refresh rates, HDR badges, pixel density, and how to read a spec sheet.

How the tests work

Each test draws carefully chosen colors, gradients, text, or moving patterns in your browser, or reads the screen information your browser exposes. Your eyes, and sometimes your phone camera, do the inspecting. That is the same way most people first notice a dead pixel, backlight bleed, or ghosting, and it is enough to find and document most visible problems.

Some values can only come from instruments: a colorimeter for brightness, contrast ratio, and color accuracy, or a photodiode and oscilloscope for response time and flicker frequency. Every test page has a section called “How accurate is this test?” that says what the test shows reliably and which instrument measures the rest.

How the guides are written

Background articles and guides explain how displays work and how to check your own. Technical statements are based on primary sources: published standards such as VESA DisplayHDR and the ISO pixel-fault classes, operating-system documentation from Microsoft and Apple, graphics-driver settings, and manufacturer manuals and warranty policies. Worked examples and illustrations are labeled as such.

FreeScreenTest does not run a testing lab and does not publish product reviews or rankings. When a standard, operating-system setting, or manufacturer policy changes, the affected page is updated and the change is listed below.

What stays on your device

Saved test and quick-check history uses browser storage on the device where you created it. Unfinished report-builder inputs and selected photos stay only in the current page session and disappear on reload unless you export a report. FreeScreenTest does not require an account, and photos are not uploaded anywhere.

Analytics is separate. If you choose to allow analytics, the site can send page and interaction events to Google Analytics as described on the Privacy page. Your consent choice can be changed from the footer.

Recent updates

October 1, 2026 · Background articles on every test page: Each of the 20 tests now explains the problem it checks: for example how backlight bleed differs from IPS glow, how an RGB range mismatch crushes blacks, and how PWM dimming causes flicker. Each article covers causes, settings, fixes, and common questions.
September 22, 2026 · From a comparison to a support record: The inspection guide explains when a monitor-generated pattern changes the troubleshooting question and applies a named manufacturer's manual. A labeled record-writing example leads to the report's comparison notes. The motion reference now publishes the actual shapes, colors and requested timing of its patterns.
September 22, 2026 · Explanations with inspectable inputs: The specification guide now works through scaling, refresh intervals, and HDR test conditions. The frame-arrival illustration publishes both synthetic sequences. The text-source comparison includes its deliberately small original PNG and creation details. These are calculations and educational specimens, not hands-on product reviews.
September 20, 2026 · Comparisons you can reproduce: The grayscale reference publishes its source values and downloadable image. The viewing-distance example shows its equation and calculated inputs. The buying worksheet traces a connection decision to a named manufacturer's manual. These materials show how to check the reasoning without implying hands-on product testing.
September 20, 2026 · Observations require a person: The checkup now pauses for an explicit observation instead of treating elapsed time as a clean result. Manual inspection forms require a selected finding. Setup notes travel with saved observations into reports. The inspection guide includes a labeled illustration of content-linked and fixed-position marks.
September 12, 2026 · Repeatable text comparisons: The text check gained one unchanged reference, a current browser pixel-ratio readout, and explicit “none” or “not assessed” choices. Its troubleshooting guide explains how to repeat a single setting change.