BKY File Extension

BKY file icon

Bookkey Bookmark/keyword Data

What is a BKY file?

The BKY extension is related to Bookkey Bookmark/keyword Data and is classified in the Data Files category, which contains 6196 files.

The Bookkey Bookmark/keyword Data (BKY) was developed by MIT, which created file format and programs to work with them.

BKY files are supported by Windows. To create a BKY file, you can choose from 2 programs such as Bookmarks by Keywords and miTaggedMarks.

Programs that support BKY files

How to open a BKY file?

If you cannot open a BKY file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.

Bookmarks by Keywords and miTaggedMarks stand out as the preferred programs to manage BKY files effectively. To install the current version of Bookmarks by Keywords, go directly to the official Branth website. The universal package for all operating systems is available there.

After successful installation, your operating system should seamlessly handle BKY files via Bookmarks by Keywords.

Set Bookmarks by Keywords as the default BKY program

Change Default Program on Mac

  1. Right click or Control + left click on the desired BKY file;
  2. Choose "Open in Application" and click "Other";
  3. Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
  4. Select "All Programs" from this menu and proceed to search for Bookmarks by Keywords. Check the box next to "Always open in app" to set it as the default option.

Set default programs for Windows

  1. Start by right-clicking on your BKY file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
  2. In the pop-up window, select the Bookmarks by Keywords application;
  3. Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening BKY files.

Solve problems with BKY files

BKY files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.

What are the ways to check if my BKY file is damaged?

BKY data files that have become corrupted may display one or more of the following symptoms:

  • The file does not respond or shows errors when opening it;
  • The file exhibits poor performance during editing operations in Bookmarks by Keywords;
  • The file stops responding or freezes in Bookmarks by Keywords or other programs;
  • Unexplained BKY file size inflation;
  • Actions performed on the file result in the appearance of error notifications;

Why does Bookmarks by Keywords crash or shut down frequently?

Insufficient updates for Branth products can cause Bookmarks by Keywords to crash. Be sure to regularly install the latest software updates.

Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.

Is there any specific software or utility that can help repair a damaged BKY file?

Use a recovery program to open the damaged BKY file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged data files.

How to edit a BKY file?

To make changes to BKY files, you need specialized software that allows both opening and editing the data files. Online BKY editors offer fewer capabilities than applications optimized for Bookkey Bookmark/keyword Data.

Best BKY Editor Software in 2026

With the mentioned criteria in mind, we have assembled a selection of BKY editors.

BKY Editor SoftwareDeveloperPlatformsOverall Rating
Bookmarks by KeywordsBranthWindows4.8 out of 5 (35 reviews)
miTaggedMarksBranthWindows4.2 out of 5 (43 reviews)