A ZST file is a compressed file container generated using the Zstandard (zstd) compression algorithm. Developed by Yann Collet at Facebook in 2015, Zstandard is a modern lossless compression format designed to address the tradeoffs of older algorithms: it provides compression ratios similar to Lzma/7z but at speeds comparable to Gzip. Today, ZST is widely used for compressing databases, virtual machine layers, and system packages.
Not natively supported on Windows or macOS out of the box., Requires modern libraries to run, making it less common on legacy server infrastructure., Single-file compression: Requires wrapping in a TAR archive for folder structures.
Zstandard combines a dictionary-matching stage (LZ77) with a large search window and a fast entropy coding stage using Finite State Entropy (FSE) based on Asymmetric Numeral Systems (ANS). FSE allows Zstandard to encode symbols at fractional bit lengths without the CPU overhead of traditional arithmetic coding.
Yann Collet released Zstandard in 2015. It was designed to replace zlib/GZIP in enterprise infrastructure. Zstandard was standardized under RFC 8878 in 2020. Due to its speed, it was adopted by Arch Linux in 2019 to replace XZ for package management, reducing system installation and package download processing times.
Typical naming templates and folder layouts:
Zstandard is highly secure and features CRC-32 integrity checks. However, users should run checks on downloaded packages to verify signatures before decompressing executable content.
It is a compressed file container utilizing the Zstandard compression algorithm developed by Facebook.
Windows doesn't open ZST natively. You can decompress them using our online client-side tool or install 7-Zip.
Yes. Extraction is 100% local inside your browser sandbox memory. No files are uploaded to any server.
Arch Linux uses Zstandard because it decompresses packages significantly faster than XZ, reducing update install times.
Yes. The extractor decompresses the Zstandard stream first, and then unpacks the underlying TAR file tree.
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Download individual files or use "Download All" to save them one-by-one.
Simply visit iLoveExtract on your mobile Safari or Chrome browser, tap the big "Select Archive File" button, choose the archive from your Files app, and download the extracted items. It requires no installation.
No. All extraction runs completely client-side in your browser's memory using modern JavaScript modules and WebAssembly. Your files are never uploaded to any server, making the process 100% private and offline-compatible.
We enforce dynamic client-side limits depending on your device's capacity to prevent tab memory overflow (100 MB for mobile, 200 MB for standard systems, and 250 MB for high-performance desktop systems).
This basic version supports standard, unencrypted ZIP, RAR, 7z, and TAR archives. Support for password-protected archives is not currently active.
The file size exceeds the supported safety limit.