Did Windows File Explorer suddenly stop showing photo, video, and document previews PDF? The generic icons appear instead, and you don't know how to solve the problem. Do you want to enable the display of file previews, such as videos MKV and FLV, which are not normally supported by the Windows or macOS file manager? No problem, I'm here today to help you solve this kind of problem!

If you spend five minutes of your free time with me, I can explain how to see previews in Windows and macOS they will act in the File settings Explore and Finder (the file manager of the two operating systems) and if you are interested, I can explain how to enable previews for those file types that are not normally supported, such as the aforementioned videos in MKV or FLV format.

So can you know what are you waiting for? Make yourself comfortable, carefully follow the instructions below and try to put them into practice. I assure you that, in a very short time, you will be able to activate the previews of all the types of files you want and solve any problem related to their visualization in the Explorer and file finder. Happy reading and enjoy!

Viewing previews in Windows

If you want to find out how to see previews in ' File Browser de windowsTake a few minutes of free time and follow the instructions below. I assure you that you will be able to solve all your problems related to previewing in Microsoft's file manager.

Enable previews in File Explorer

If you can no longer see the file previews in File Explorer and simple icons are shown, please do this: open any folder, click the button office hour placed in the upper left and select the item Change folder and search options from the menu that opens.

At this point, select the card visit from the window that opened, remove the check mark from the option Always show icons, never previews and click on the buttons apply y good guidance on save the changes. If you are using a version of Windows prior to 8.x, to achieve the same settings, you must open any folder and then select the item Folder options of menu instruments (above)

In a few seconds, Windows File Explorer should show previews again instead of icons (for supported files). I remind you that the preview is not available if it is in the menu view File Explorer activates a display mode between list, details y Small icons. To have the file previews with these display modes active, you need to retrieve the File Explorer Preview Pane by clicking the button Preview panel located on the top left of the card view (However, only previews of files selected with the mouse or the keyboard at that moment).

If after turning off the "Always show icons, never previews" option, you still do not see file previews in File Explorer, try restarting the Windows file manager and clearing the preview cache files.

  • To restart the file explorer, right click on the taskbar (the one at the bottom of the screen) and select the item Activity management from the menu that appears. In the window that opens, if necessary, click on the item More details to see the list of all processes running on your PC, then go to the tab processes, select Windows Explorer and click on the button resume located in the lower right.
  • To clear the cache preview files, click the button. comienzo (the flag icon located in the lower left corner of the screen), look for "Disk cleanup" in the menu that opens and select the utility icon Disk cleaning from search results. In the window that opens, put the check mark next to the item preview, Click the button good and that's it

Preview unsupported files

Do you want to see previews of files that are not natively supported by Windows File Explorer, such as MKV or FLV videos? No problem: By installing third-party software, you can expand the potential of Windows File Manager and preview even for those file formats that are not normally supported.

By going into more detail, you can preview all the major video file formats by installing ADVANCED Shark007 codecs - A free video codec pack that adds support for all major video file formats to Windows Media Player and consequently to the File Explorer of the operating system Microsoft.

To download ADVANCED codecs from Shark007 to your PC, connect to this page of the MajorGeeks website and click on one of the links Download @ of executions present in it. The download is complete open, by double clicking on it, the file ADVANCED_Codecs_vxx.exejust download and click the button first yes and then good y siguiente.

Then add the check mark next to the article I accept the terms of the license agreement. and finish the configuration by first clicking on siguiente three consecutive times and then up install y final.

Mission accomplished! Now open File Explorer and you should also find previews for those video file formats (eg AVI, MKV, and FLV) that were not previously supported by Microsoft's file manager.

When in doubt, you can remove the video file previews from Windows File Explorer by simply uninstalling the ADVANCED codecs Shark007 from the Windows control panel (following the standard procedure for uninstalling programs). If you are not very familiar with the PC and do not know how to uninstall a program, also read the tutorial I dedicated to the topic.

See previews on Mac

Use a Mac and you can no longer see file previews in Finder? Do you want to see previews of files, such as videos in AVI format or files in the ZIPwhich are not normally supported by the macOS file manager? No problem, here's how to do it.

Enable previews in the Finder

If the Finder has stopped displaying file previews and instead displays anonymous icons, proceed as follows: open any window in the discoverer, go to the menu view located at the top and select the item Show view options From the last batch.

In the window that opens, place the check mark next to the item Show preview icon located at the bottom and the game should be done: instead of the icons, in fact, the Finder should now show the previews of all the files supported by the Quick Look system, then PDF documents, photos, videos in format MP4, etc. From the same window, if you wish, you can also adjust the size of the icons and the criteria for arranging them by default.

If you want to see a large preview of the selected files in the Finder, go to the menu view (above) and put the check mark next to the option I like Cover Flow : In this way, a box will appear at the top of the window, through which you can see a large preview of the selected file in the Finder.

Also, I remind you that by clicking on a file and then pressing space bar on the keyboard or, in the case of Macs equipped with a touchpad, by doing a deep touch or a three-finger touch on a file, you can preview the file through the MacOS Quick Look system.

Preview unsupported files

If you want to expand the Finder functions and see previews even for those file formats that are not normally supported, you must install extensions for QuickLook.

For example, if you want to preview all the major video file formats (in addition to MP4, which is natively supported by macOS), you can install the plugin QuickLook Video, which is completely free and allows you to preview files in .asf, .avi, .flv, .mkv, .rm, .webm, .wmf, and other video formats. It is optimized for macOS 10.9 and later, on macOS 10.8 and earlier it requires the installation of Perian.

To download the QuickLook Video plugin, connect to the Github page that hosts it and click on the first package link you find on it (ex. QLVideo_191.pkg ). When the download is complete, open the package PKG that you have downloaded to your PC and, in the window that opens, first click on the button continued twice in a row and then to accept, continued y install. Then, enter the password of your user account in macOS (the one you use to access the system) and finish the configuration by first pressing on Install software and then search y movement.

Mission accomplished! From now on, your Mac Finder should also be able to show you video previews in a format other than classic MP4. If in doubt, to uninstall QuickLookVideo, open the terminal (you can find it in the folder more la Launchpad ) and give the command sudo rm -rf "/ Library / Application Support / QLVideo" "/Library/QuickLook/Video.qlgenerator" "/Library/Spotlight/Video.mdimporter", followed by pressing the button presentar on the PC keyboard and entering the macOS administration password.

note: After installing the plugin, you may notice a small temporary PC slowdown due to video indexing that the Finder did not support previously.

Would you like to see the content of the ZIP files without having to extract them first? You can do it: just install the BetterZip Plugin for Quick ViewSelect the file to preview and retrieve Quick View by pressing the space bar on the keyboard or using the appropriate trackpad gesture (three-finger tap or hard tap, on Macs with Force trackpad Touch).

To download the BetterZip plugin for Quick Look, link to this web page and click the link Legacy version 1.5 under the heading BetterZip Quick Look Generator (legacy versions). When the download is complete, remove the ZIP archive you just downloaded and copy the file BetterZipQL.qlgenerator in the folder / Library / QuickLook / of your Mac

If you don't know how to get to the folder / Library / QuickLook / on your Mac right-click the Finder icon in the Dock bar and select the item Go to folder from the menu that appears. Then write the path / Library / QuickLook / in the window that opens and let's go presentar.

To activate the plugin, you must restart the Quick Look service by opening the terminal and giving the order qlmanage -r.