lzma

.lzma — Lempel–Ziv–Markov chain Algorithm

Igor Pavlov · 2001

Developer

Igor Pavlov

Key Features

Lossless storage behavior for typical archive workflows
Common MIME type: application/x-lzma
Recognizable file signature: N/A (No standard header signature)
Associated with Igor Pavlov

Best For

Packaging files for download
Backups and transfers
Reducing storage overhead

Less Ideal For

Direct viewing without extraction
Live editing inside the package
Formats requiring immediate preview

Common Use Cases

Bundling many files together
Reducing transfer size
Preserving directory structure during sharing

How to Open It

On Windows, open the file with 7-Zip or PeaZip.
On macOS, open the file with The Unarchiver or Keka.
If the file does not open, confirm that the extension really matches .lzma and that the download or transfer completed without corruption.

What is a .lzma file?

LZMA (Lempel–Ziv–Markov chain Algorithm) is a lossless data compression format and algorithm. It is known for its high compression ratios, often outperforming other popular compression methods. LZMA files are commonly used for archiving and distributing large datasets.

Programs That Open .lzma Files

Platform	Program
Windows	7-Zip	Free
	PeaZip	Free
	WinRAR	Paid
macOS	The Unarchiver	Free
	Keka	Free
	p7zip	Free

Common Problems with .lzma Files

⚠️ Cannot open LZMA file

Ensure you have a compatible decompression program installed, such as 7-Zip, PeaZip, or The Unarchiver. Verify the file is not corrupted.

⚠️ File is partially corrupted

If the archive tool supports recovery, attempt to use its repair function. Otherwise, you may need to re-download or re-extract the original files.

⚠️ Unknown decompression error

Try decompressing the file with a different, reputable archiver. Check online forums for specific error codes related to LZMA.

Frequently Asked Questions

Is LZMA a lossless compression format?▼

Yes, LZMA is a lossless compression format, meaning that no data is lost during the compression and decompression process.

What is the main advantage of LZMA over other formats?▼

The primary advantage of LZMA is its high compression ratio, which allows for smaller file sizes compared to many other common compression formats.

Can I open LZMA files on any operating system?▼

LZMA files can be opened on most operating systems, including Windows, macOS, and Linux, provided you have compatible decompression software installed.

Technical Details

LZMA uses a combination of the LZ77 algorithm and a Markov chain compressor. It does not have a standard header signature, but streams typically begin with a stream header containing properties like dictionary size, but this can vary.

Did You Know?

LZMA was developed by Igor Pavlov, the author of the 7-Zip archiver.

The 'Markov chain' part of its name refers to a mathematical model used in the algorithm's compression stage.

LZMA is often used in conjunction with the .tar format (e.g., .tar.lzma) to archive multiple files before compression.

Security Information

LZMA files themselves are not inherently malicious. However, like any file type, they can be used to distribute malware. Always ensure you trust the source before opening an LZMA file.