KLM file: How can I open a .KLM file?
The table below provides useful information about the .klm file extension. It answers questions such as:
- What is the .klm file?
- What program do I need to open a .klm file?
- How can the .klm file be opened, edited or printed?
- How can I convert .klm files to another format?
We hope you find this page helpful and a valuable resource.
✅ Unknown KLM File

The KLM file extension is currently unknown, according to our knowledge it has not yet been specified or assigned to an application. If you found a KLM file of unknown origin on your computer, it's possible that a dangerous software had created it. If you have helpful information about this file extension, write to us!
⚠ Be careful with .klm files.
It's important to know that the .klm file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .klm files. Be cautious when dealing with .klm files from unknown sources.
🚫 The .klm file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .klm file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Select an app to open this .klm file
It means that the operating system does not have a default app associated with the .klm file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .klm file. A context menu will appear.
- From the context menu, select Open with. Windows will display a list of recommended apps.
- If the desired app is listed, select it from the provided options.
- If you cannot find the appropriate app, you may need to install software that supports the specific file type.
If you don't know how to change the default app for the .klm file, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .klm file extension, write to us.