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PeaZip is a free cross-platform file compressor utility that provides an unified portable GUI for many Open Source technologies like 7-Zip, Brotli, FreeArc, PAQ, UPX, ZSTD... free alternative to WinRar, WinZip and similar proprietary software.
- Create 7Z, ARC, BR, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP, ZST files
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more, over 200 archive types supported
Features of PeaZip includes: archives opener and extractor, manage Zstandard format, batch creation and extraction of multiple archives at once, convert files, create self-extracting archives, split and join files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hash & checksum, export task definition as script.

WHAT IS PEAZIP

FILE COMPRESSION BENCHMARKS

REVIEWS

What is ZST format, Zstandard compressed files

WHAT ARE ZST FILES, FACEBOOK'S ZSTANDARD COMPRESSION ALGORITHM

What are ZST files, Facebook's Zstandard compression algorithm

ZST file extension designates a pure data compression format, not providing file archival or encryption features.
The input data is compressed with Facebook's Zstandard algorithm, a new flexible design that at lower compression settings provides faster than Deflate (Gzip / ZIP) performances and at highest compression settings provides compression ratio comparable with 7-Zip's LZMA (.7Z).
A goal of Zstandard design is near-real time extraction, performing very fast (faster than Gzip / ZIP) and with small variations in decompressing ZST created with lowest or higher compression settings.

Zstandard implementation, ZSTD, making use of multi-threading parallelism and on recent multi-core CPUs currently outperforms single-threaded Brotli implementation at similar levels of compression.

Due to the by-design limitation of being a single file compressor, PeaZip uses Zstandard compression cascaded with TAR archiving in order to consolidate multiple input files / folders into a single container, which is then compressed originating a .tar.zst file.
Zstandard-compressed tar archives are sometimes identified as .tzst instead.

When is Zstandard compression recommended

Zstandard algorithm is very flexible and can provide a wide range of compression levels with reasonable performances, but excels when fast compression is desired, reaching Deflate-level compression ratio in significantly shorter times.
Also, extraction is very fast and outperforms alternatives, making it an excellent choice where extraction speed are important and where decompression tasks are more common than compression ones.

Read more about .zst file type on ZSTD official repository Zstandard online

, and Zstandard ZSTD compression

entry on Wikipedia.

PeaZip features creation and extraction of Zstandard files on Windows and Linux systems using Facebook's ZSTD implementation, and can read (open, test and extract) and write (compress to) ZST file type.

.ZST	Authors Yann Collet, Przemysław Skibiński (Facebook), 2015 limited to 1 single file as input

SPEED

ZST format can reach very high compression and decompression speed. Designed making use of parallelism of modern CPUs, ZSTD implementation is significantly faster than Deflate while providing comparable compression levels, and is still efficient at higher compression levels.

COMPRESSION RATIO

Zstandard flexible compression scheme allows to provide both very fast compression and to reach LZMA-like compression ratios at higher compression settings.

ADVANCED OPTIONS zstandard features

ZST format is meant purely for providing fast data or single-file compression, and lacks archiving, encryption features by design.

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FAQ > Archive file types > What are ZST compressed files

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