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What is an LZMA File?

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Question: What is an LZMA File?

Did you find an LZMA file on your computer and wonder what program should open it? Maybe someone emailed you an LZMA file but you're not sure how to use it. Perhaps you tried to open the LZMA file but Windows told you that it could not open it.

Before you can open an LZMA file (assuming it's even a file format that's intended to be viewed or edited), you'll need to determine what kind of file the .LZMA file extension refers to.

Answer: A file with the LZMA file extension is an LZMA Compressed file.

Other types of files may also use the LZMA file extension. If you know of any additional file formats that use the .LZMA extension, please let me know so I can update this information.

How To Open an LZMA File:

The easiest way to open an LZMA file is to double-click on it and let your PC decide which default application should open the file. If no program opens the LZMA file then you probably don't have an application installed that can view and/or edit LZMA files.

Warning: Take great care when opening executable file formats received via email or downloaded from websites you're not familiar with. See my List of Executable File Extensions for a listing of file extensions to avoid and why.

LZMA files can be opened with any popular compression/decompression program, the free 7-Zip tool being one example. Any of these types of programs will decompress (extract) the contents of an LZMA file and some may also have the ability to create LZMA compressed files.

If you know anything else useful about LZMA files, please let me know so I can update this page.

Tip: Use Notepad or another text editor to open the LZMA file. Many files are text-only files meaning no matter the file extension, a text editor may be able to properly display the file's contents. This may or may not be the case with LZMA files but it's worth a try.

If you find that an application on your PC does try to open the LZMA file but it's the wrong application or if you would rather have another installed program open LZMA files, see my How To Change the Default Program for a Specific File Extension guide for making that change in Windows.

How To Convert an LZMA File:

There are two main ways to attempt to convert an LZMA file to another file type:

The first option involving opening the LZMA file in its native program is preferable because it's both easier and will probably result in a more accurate file conversion. Of course if you don't have a program that opens LZMA files, a third-party file conversion tool (the second option) could be very useful.

Important: You cannot usually change a file extension (like the LZMA file extension) to one that your computer recognizes and expect the newly renamed file to be usable. An actual file format conversion using one of the methods described above must take place in most cases.

Still Having Problems Opening or Using an LZMA File?

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the LZMA file and I'll see what I can do to help.

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