Skip to content

Seven free tools to diagnose and calibrate the status of your monitor

27 mayo, 2021

In recent months we have been offering you various lists with useful tools to find out who may be stealing your WiFi, check the health of your hard drive, dominate its partitions, or monitor the performance of Windows, GNU / Linux and macOS. Now it is the turn of another important component for any computer, its monitor.

Therefore, today we are going to offer you a list of free tools to diagnose the status of your monitor and calibrate it to your liking. Some are installable tools, but since we want it to be a useful tool for all operating systems we have also included several webapps that will work on any operating system.

9 PROGRAMS so GOOD it’s hard to believe they’re completely FREE

Photo Friday

Photo Friday

Photo Friday is a monitor calibration tool, a web page that will show you several elements with which it will help you adjust the brightness and contrast of your screen. The idea is that you have it open, and that based on what you see in it you can get tangled up in the configuration of your monitor. For it to work better it is recommended to press F11 to see it in full screen.

Thanks to the elements that this website shows, when you make changes to the configuration of your monitor you will be able to distinguish tone transitions from the blackest black to the true white, and see in real time the influence of the changes you make. It includes several tips that explain how to calibrate the screen using the web.



If you have noticed that your screen has a pixel that appears dead, the only thing that may happen is that stuck on a certain color, something that can be annoying. JScreenFix is ​​a web application that can help you. It does this by creating a box that shows hundreds of different colors per second, and that you can move around the screen to put it in the area where the rebellious pixel is.

Keeping the box on the affected area for about ten minutes, the rogue pixel should unblock and go back to normal. It is not something that always works, of course, but in the event that the problem with the pixel persists, it may be because it is a physical defect on the screen and that it will always stay there. Still, it is a good tool to give it a second chance before giving it up for lost.

Screen Check

Screen Check

This is another screen to calibrate the monitor, a simpler and simpler, but in which you can also see if you have our brightness and color well configured. It is called Screencheck, and in its upper bar the tones are checked with a white to black band. Meanwhile, the lower one shows a smooth RGB spectrum to check for color breakage.

Eizo Monitor Test

Eizo Test

Eizo Monitor Test is a simple piece of freeware that contains various tests to test performance of your monitor. You don’t need to install anything, you download a .zip file, unzip it and use the executable to launch it. There are several tests, and you will have a control panel with a button that serves to advance through them.

Among the tests you will find those of patterns, reproduction of the colors black, white, red, green and blue, moiré patterns, geometry, gray scales, gray gradients, contrast, convergence, and response tests. It also offers consistent colors so you can find dead pixels.

The Lagom LCD Monitor Test Pages

The Lagom Lcd Monitor Test Pages

Another page to test your computer monitor and calibrate it, only that unlike the others, it does not settle for a single test but rather offers you a whole compilation of them. With The Lagom LCD Monitor Test Pages you can measure contrast, gamma calibration, black level, white saturation or response times.

With each test you click, some instructions explaining how to use it when calibrating the computer, although these tutorials are something that can be disabled. The web also gives you the option to download all these images in a ZIP file, so that you can take them on a USB and calibrate the monitor of other computers.

Monitor Calibration Wizard

Monitor Calibration Wizard

Monitor Calibration Wizard is another simple, free and easy-to-use application to calibrate your monitor and detect possible defects. It works for all Windows operating systems as of 95, and its great benefit is that It guides you step by step through the process creating a unique profile for each computer.

It has support for an infinite number of profiles, it gives you tips for prevent other programs from changing settings of color in your Windows, and in general it simplifies to the maximum the sometimes complex task of having the monitor configured as it should.

Online Monitor Test

Online monitor test

And we end up with another website to calibrate the screen, because Online Monitor Test is simply the best you can find. It has three modes, each with several options. The first is the Color Range, which offers you the possibility of seeing several color palettes or all on a single page, and thus being able to see if your monitor handles color gradients well.

With the options of Trailing You can move a box across the screen to check for traces or ghost images. And finally there are the option tests Homogenuity, which show flat colors to help you identify dead pixels or faulty monitors with backlight leaks.

Header image | Jon B
In Genbeta | How to constantly monitor your Windows performance