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LCD Screen Test

Run a free in-browser LCD screen test in under a minute. Pick a color tile - red, green, blue, black, white, or yellow - and the page paints that solid fill across the full viewport so a stuck pixel, a dead pixel, or backlight bleed stands out against a uniform field. No install, no account, no upload.

Last reviewed: 2026-06-29

PropertyValue
FormatOnline tool, no install
SpeedBrowser-side; output in seconds
PrivacyFiles stay on-device
Implementing toolhttps://freetoolonline.com/device-test-tools/lcd-test.html
See four LCD screen test facts: online format, browser speed, on-device privacy, and the LCD test tool.
Online tool, browser-side fill, stays on device, links to LCD test.

Below the color tiles the page reports three live numbers about your display: the live viewport, the screen resolution the operating system advertises, and the native screen resolution that resolution multiplied by your device pixel ratio. Confirm the native number matches the spec sheet for your laptop or monitor before flagging a suspect dot, because on a hi-DPI panel one CSS pixel sits in front of several physical sub-pixels, and a stuck sub-pixel can hide between them. The readout refreshes on each load, so a fresh check is one reload away.

If you need to determine whether your display is an LED or LCD panel first (the distinction changes which color pattern is most revealing), see LED test vs LCD test - which applies to your screen. The same test is available in Indonesian at tes LCD.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

Why trust these tools

  • Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
  • No install, no sign-up. Open a tool and get a working output in seconds - nothing to download and no account to create. Tools that need heavy processing run it on our service, so even a low-powered machine gets the job done.
  • Analytics stops at the page view. We measure which pages get visited, not what you type or upload inside a tool. There is nothing to sign in to and no profile is attached to your input.
  • Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
  • Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.

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  • LCD Test - Test your LCD screen for dead pixels, stuck pixels, and backlight bleed.
  • Microphone Test - Free microphone test online: live spectrum meter, mic permission check, and optional speaker
  • Device Test Tools - Test camera, microphone, keyboard, and LCD online before meetings.
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  • Screen Recorder - Record your screen, camera, or microphone in the browser, blur faces while recording, and download
  • GPU Test - WebGL Benchmark & Info - GPU Test - WebGL Benchmark & Info - See what your browser's graphics stack can do - WebGL 1 and 2
  • Speaker & Audio Channel Test - Test left and right speaker channels with a short in-browser tone.
  • Mouse Test (Buttons & Scroll) - Mouse Test (Buttons & Scroll) - Check left, middle, and right buttons, pointer coordinates, and
  • Gamepad / Controller Test - Gamepad / Controller Test - Check controller buttons and stick axes in the browser.
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Tags: #device-test, #guide, #lcd, #screen, #test

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