LZMA SDK (Software Development Kit)
The LZMA SDK provides the documentationsamplesheader fileslibraries
and tools you need to develop applications that use LZMA compression.
| Link |
Size |
Date |
Version |
Description |
| Download |
1.7 MB |
2026-02-12 |
26.00 |
LZMA SDK
CC++C#Java
x86/x64/arm64 binaries for Windows |
| Download |
1 MB |
2023-06-20 |
23.01 |
| Download |
12 KB |
2015-06-14 |
|
LZMA Specification (Draft) |
What's new:
- 26.00: Some minor fixes.
- 25.01: The code for handling symbolic links has been changed to provide greater security when extracting files from archives.
- 25.00: 7-Zip for Windows can now use more than 64 CPU threads for compression.
- 24.09: The default dictionary size values for LZMA/LZMA2 compression methods were increased.
- 24.05: New filter for RISC-V executables.
- 23.01: New filter for ARM64 executables. BCJ2 filter was improved for better compression ratio. Some bugs were fixed.
- 21.07: Some minor changes and fixes.
- 21.06: The bug in LZMA encoding function was fixed.
- 21.03 beta: LZMA dicrionary up to 4 GB. Speed optimizations.
- 21.02 alpha: macOS and Linux support. Speed optimizations.
- 19.00: Encryption strength for 7z archives was increased.
- 18.06: Some speed optimiztions in LZMA/LZMA2 code.
- 18.05: Some speed optimiztions in LZMA/LZMA2 code.
- 18.01: Some changes in LZMA2/xz multithreading code for compressing. Some bugs were fixed.
- 9.35: AES code and SFXs modules were included to SDK.
- 9.20: New small SFX module for installers.
- 9.11: PPMd support.
- 9.04: LZMA2 and XZ support.
- 4.62: LZMA SDK is placed in the public domain.
LZMA / LZMA2 are default and general compression methods of 7z format
in the 7-Zip program provides a high compression ratio and
fast decompressionso it is very suitable for embedded applications.
For exampleit can be used for ROM (firmware) compressing.
LZMA SDK includes:
- C++ source code of LZMA Encoder and Decoder
- C++ source code for .7z compression and decompression (reduced version)
- ANSI-C compatible source code for LZMA / LZMA2 / XZ compression and decompression
- ANSI-C compatible source code for 7z decompression with example
- C# source code for LZMA compression and decompression
- Java source code for LZMA compression and decompression
- lzma.exe for .lzma compression and decompression
- 7zr.exe to work with 7z archives (reduced version of 7z.exe from 7-Zip)
- SFX modules to create self-extracting packages and installers
ANSI-C and C++ source code in LZMA SDK is subset of source code of 7-Zip.
LZMA features:
- Compression speed: 2-8 MB/s on 4 GHz CPU using two cpu threads.
- Decompression speed on single cpu thread:
- 30-100 MB/s on modern 4 GHz CPU (IntelAMDARM).
- 5-15 MB/s on simple 1 GHz RISC CPU (ARMMIPSPowerPC).
- Small memory requirements for decompression: 8-32 KB + DictionarySize
- Small code size for decompression: 2-8 KB (depending on speed optimizations)
The LZMA decoder uses only CPU integer instructions and can be
implemented for any modern 32-bit CPU.
License
LZMA SDK is placed in the public domain.
Anyone is free to copymodifypublishusecompilesellor distribute the
original LZMA SDK codeeither in source code form or as a compiled binaryfor
any purposecommercial or non-commercialand by any means.
Note: The abbreviation LZMA originally stood for
Lempel - Ziv - Markov chain - Arithmetic coding.
Preliminary versions of LZMA used arithmetic coding.
But in the final version of LZMAarithmetic coding was replaced by range coding.
LZMA Links
Copyright (C) 2026 Igor Pavlov.
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