LZMA_Alone

File Format
Name	LZMA_Alone
Ontology	Electronic File Formats Compression LZMA_Alone
Extension(s)	.lzma
MIME Type(s)	application/x-lzma

LZMA_Alone, also known as .lzma format, is a compressed file format that uses LZMA compression. It is sometimes simply called LZMA or lzma, but that can be misleading, because "LZMA" more commonly means the raw LZMA compressed data format.

LZMA_Alone is deprecated, in favor of XZ. Other LZMA-based alternatives include 7z and Lzip.

Format

LZMA_Alone files have a 13-byte header.

Identification

There is no signature, and no simple way to identify LZMA_Alone files just by looking at the header. That said, it is common for them to start with bytes 5D 00 00.

The lzmainfo utility from XZ Utils can help with identification.

Specifications

• XZ Utils source → doc/lzma-file-format.txt

Software

• LZMA SDK
• XZ Utils:
  • xz (with appropriate options), lzma, unlzma, lzcat
  • lzmadec
  • lzmainfo
  • liblzma
• 7-Zip