Zstd – The Compression Tool of the Future

Utilities & Operating Systems
May 8, 2025
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4 minutes read

Zstd is a free and modern open-source compression algorithm developed by Facebook (Meta). It is available for Windows, macOS, Linux, FreeBSD, and other platforms.

Key Features of the Zstd Compression Tool

Compression algorithms are an essential part of many modern applications. They are typically divided into lossless and lossy algorithms. Common lossless algorithms include: Gzip, XZ, LZ4, Bzip2, LZMA, Brotli, FLAC, and PNG. Well-known lossy algorithms include: JPG, MP3, AAC, AVIF, OGG, and H.265. Obviously, lossy algorithms achieve a higher compression ratio and are usually used for multimedia files, where a certain level of quality loss is either imperceptible or acceptable.

Zstandard, or Zstd for short, is a lossless algorithm. Its developers aimed to create a tool that provides high compression ratios, operates quickly, and consumes little memory. First released in 2015, it represents one of the most significant advancements in data compression in recent times.

Zstd supports adjustable compression levels (ranging from 1 to 22). Lower values offer higher speed, while higher values provide better compression ratios. The algorithm can utilize multi-threading to process large files using multiple CPU cores.

Zstd supports dictionary-based compression, allowing extremely efficient compression of small, similar files such as JSON, XML, and log files. In addition, Zstd includes data integrity verification mechanisms such as CRC32 and XXHASH checksums.

Zstd is integrated with numerous tools and libraries. It is used as the default compression method in the Linux kernel, Arch Linux, Fedora, Facebook infrastructure, systemd, and file systems such as ZFS and Btrfs. Compressed files include all the metadata needed for decompression. It can be used as a CLI (command-line interface) tool as well as through libraries in many programming languages. It is also present in modern archiving applications like WinRAR, 7-Zip, NanaZip, and others.

Zstd Compression Tool in Practice

Given the volume of digital data and its transfer between media, efficient compression plays a very important role. Zstd has become popular due to its adaptability, ease of use in real-world applications, and support for multiple platforms. It is a lossless compression algorithm that strikes a balance between speed and compression ratio.

Basic terminal commands for working with Zstd include:

To compress:
zstd file.txt
This will create file.txt.zst.

To decompress:
unzstd file.txt.zst
or:
zstd -d file.txt.zst

Compression with a defined level:
zstd -11 file.txt

Using multiple CPU cores:
zstd -T4 file.txt

One of the best aspects of this algorithm is its very fast decompression. In practice, it is significantly faster than Gzip, and at higher compression levels, it offers slightly better ratios than Bzip2 or XZ. Additionally, it uses fewer resources. Zstd integrates easily into more complex projects and has already proven its value in numerous real-world applications.

This algorithm is free, open-source, and under active development. Fast decompression makes it ideal for applications that read large amounts of data from compressed archives, such as databases, containers, log files, backup archives, and more. Zstd is often used to compress data transmitted over networks. Cloud providers and storage systems are increasingly adopting Zstd to reduce stored data volume.

Platform:
Windows, Linux, macOS, and FreeBSD