Screen test vs LCD test - same thing?
Yes. Screen test, display test, monitor test, LCD test, color test, and dead pixel test all describe the same procedure: a sequence of full-screen color and pattern fills used to spot defects you cannot see in normal use. The labels come from how vendors and search queries name the tool; the underlying check is identical. This guide maps each label to the right tool on this site so you do not bounce between pages.
Screen / display / monitor / LCD test - all the same check
Whatever phrase you searched, you want a tool that fills the screen with a solid color (red, green, blue, black, white, gray, yellow) so you can inspect every pixel for dead, stuck, or color-uniformity issues. That is exactly what the LCD Test tool runs. The buttons are labelled with the colors, not with the search-query phrase, so the same tool covers every label above.
Use it when you want to:
- Check a new monitor for dead pixels before the warranty window closes.
- Verify a used display before paying for it.
- Confirm a phone, tablet, or laptop screen shows uniform color across the panel.
- Document defects (with screenshots or photos) for an RMA submission.
Camera test, webcam test, video test - that is a different tool
If you searched camera test, webcam test, or video test you want to check the camera, not the screen. Open Camera Test instead - it asks the browser for camera permission, shows the live feed, and reports the resolution and frame rate. Running an LCD test on the screen will not tell you anything about the camera.
If you searched microphone test the right tool is Microphone Test; it shows the input level live so you can confirm the mic captures audio.
Quick query-to-tool map
| Search phrase you used | Tool to open | What it does |
|---|---|---|
| screen test / screen test online / my screen checker | LCD Test | Full-screen color cycle to inspect every pixel |
| display test / display test online / online display test | LCD Test | Same as above; identical procedure |
| monitor test | LCD Test | Same; works on any monitor that can show a browser full-screen |
| LCD test / LED test | LCD Test | Same; the panel technology does not change the test |
| dead pixel test / stuck pixel test | LCD Test | Use the white, red, green, blue color buttons; defects appear as off-color dots |
| color test / RGB test | LCD Test | Cycle solid colors; check uniformity edge to edge |
| camera test / test camera / webcam test / video test | Camera Test | Different tool: opens the camera and shows live feed + resolution |
| microphone test / mic test | Microphone Test | Different tool: shows live input level |
Why the same procedure has so many names
Each name reflects the era and audience that named it. LCD test dates from CRT-to-LCD migration when buyers needed a way to verify the new flat panels. Screen test and display test are general-purpose names that work for any panel technology (LCD, OLED, mini-LED). Dead pixel test and stuck pixel test name the most common defect classes the procedure catches. Color test and RGB test describe the actual on-screen action (cycling solid colors). Monitor test targets desktop-display buyers; screen test online targets people searching for a browser-based version. The procedure is the same; the search query depends on which name you learned first.
Related reading
- What an LCD test actually checks - longer breakdown of dead pixels, stuck pixels, backlight bleed, and burn-in.
- Dead pixel testing guide - warranty thresholds and documentation tips.
- How to test for dead pixels before returning a monitor - RMA-prep walkthrough.
- Device-test checklist for remote work - end-to-end check covering screen, camera, mic, keyboard.
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.
- Truly in-browser - no upload. Every file-processing tool on this site runs in your browser through modern Web APIs (File, FileReader, Canvas, Web Audio, WebGL, Web Workers). Your photo, PDF, audio, or text never leaves your device.
- No tracking during tool use. Analytics ends at the page view. The actual input you paste, drop, or capture is never sent to any server and never written to any log.
- 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.