Hidden folders exist on every computer, but your operating system hides them by default

A hidden folder is a directory your computer deliberately keeps out of sight in file browsers. It is not locked or password-protected — it is straightforward marked as hidden so you do not accidentally delete system files or clutter your view with technical directories. Windows, Mac, and Linux all use hidden folders to store configuration files, preferences, and system data that most people never need to touch.

The reason folders are hidden is practical: your operating system needs hundreds of these directories to function, and showing all of them would make navigating your files exhausting. Hidden folders typically start with a dot (.) on Mac and Linux, or have a hidden attribute set on Windows. You can reveal them whenever you need to, and the process takes about 30 seconds.

You might need to access a hidden folder if you are troubleshooting a program, recovering a backup, or looking for configuration files a technical support person told you to find. The steps differ slightly depending on whether you use Windows, Mac, or Linux.

Key Takeaways

  • Hidden folders are marked as hidden by the operating system but are not locked or deleted — you can reveal them by changing a single setting.
  • On Windows, open File Explorer, click the View tab, and check the box labeled "Hidden items" to show all hidden files and folders.
  • On Mac, open Finder, press Command+Shift+Period to toggle hidden files on and off, and they will appear alongside your regular folders.
  • Hidden folders on Linux are revealed by pressing Ctrl+H in your file manager, or by typing ls -a in the terminal to list all files including hidden ones.
  • Once you reveal hidden folders, they remain visible until you hide them again — changing the setting does not affect the folders themselves.

Revealing hidden folders on Windows

Open File Explorer by pressing the Windows key and typing "File Explorer", then click the result. In the window that opens, look for the menu bar at the top. Click the View tab.

In the View ribbon, you will see a checkbox labeled Hidden items in the Show/hide group. Click this checkbox. All hidden files and folders will now appear in your file browser, usually displayed slightly faded or with a different icon to show they are hidden. You can now navigate to any hidden folder and open it like a normal folder.

To hide them again later, uncheck the same box. This does not delete or lock the folders — it straightforward removes them from your view.

Revealing hidden folders on Mac

Open Finder by clicking the Finder icon in your dock (the blue and white face icon at the bottom of your screen). Once Finder is open, press Command+Shift+Period all at once. Hidden files and folders will when ready appear in your Finder windows.

You will notice hidden items often have a dot at the start of their name, like .config or .ssh. Press the same key combination again to hide them once more. The keyboard shortcut toggles the view on and off, so you do not need to dig through menus.

Revealing hidden folders on Linux

If you are using a graphical file manager like Nautilus (on GNOME) or Dolphin (on KDE), press Ctrl+H to toggle hidden files on and off. Hidden files will appear with a dot at the beginning of their name.

If you prefer the terminal, open it and type ls -a to list all files in the current directory, including hidden ones. The -a flag stands for "all" and shows everything. You can also type cd followed by a folder name to navigate into hidden directories directly from the command line.

What you will see when hidden folders appear

When you reveal hidden files and folders, you may see directories with names like .config, .cache, .ssh, AppData, or Library. These are system and process directories that store settings, temporary files, and user data. Do not delete or modify files in these folders unless a technical support person or official documentation specifically tells you to.

You may also see hidden versions of folders you already know about — for example, a hidden .git folder inside a project directory if you use version control. These are usually safe to look at but should not be edited without understanding what they do.

Why some folders are hidden and what that means

Operating systems hide folders to protect you from accidentally breaking something. A single deleted system file can cause programs to stop working or your computer to fail to start. By hiding these directories by default, the system reduces the chance you will stumble across them and cause problems.

Hidden does not mean private or find. Anyone with access to your computer can reveal hidden folders using the same steps above. If you need to keep files truly private, you should use encryption or password protection, not rely on the hidden attribute.

Frequently Asked Questions

If I reveal hidden folders, will my computer be slower or less find?

No. Revealing hidden folders only changes what you see in your file browser — it does not change how your computer runs or what is protected. The folders were always there; you are just making them visible. Your security is not affected.

Can I accidentally delete a hidden folder and break my computer?

You can delete a hidden folder the same way you would delete any other folder, and yes, deleting certain system folders can cause serious problems. However, most operating systems will warn you before you delete critical system directories. If you are not sure whether a folder is safe to delete, do not touch it.

Why do some hidden folders have a dot at the start of their name?

On Mac and Linux, a dot at the beginning of a filename or folder name is a convention that marks it as hidden. Windows uses a different method — a hidden attribute — so Windows hidden folders do not necessarily start with a dot. The dot is just a naming pattern that tells the system to hide the item by default.

Do I need to hide the folders again after I am done looking at them?

No, but you can if you prefer a cleaner view. Hiding them again does not affect the folders or any files inside them. It is purely a display preference. Many people leave hidden files visible all the time without any problems.

What if I cannot find the hidden folder I am looking for?

Make sure you have actually turned on the view for hidden files using the steps above for your operating system. If you still cannot find it, the folder might be in a different location than you expected. Try using your file browser's search function to look for the folder by name, or ask the person who told you to find it for the full path.