Online .ZST File Extractor
(No Size Limits)
Open and unpack compressed folders instantly in any web browser. Perfect for Chromebooks, school laptops, and managed devices where software installation is locked.
About Decompression of ZST
A .ZST file is compressed using Zstandard (zstd), a modern compression algorithm developed by Facebook offering exceptional compression ratios and blazing-fast speeds.
unpk.app leverages WebAssembly to execute native Zstandard decompression directly inside your browser tab, ensuring your files never leave your computer.
ZST FAQ
Everything you need to know about how unpk.app processes ZST locally.
What is a .zst file?
A .zst file is an individual file or archive compressed using Zstandard (zstd), a modern real-time compression algorithm developed by Facebook that offers exceptional compression ratios and blazing-fast decompression speeds.
Can I unpack a .zst file without installing software?
Yes. unpk.app leverages WebAssembly to execute native Zstandard decompression directly inside your browser tab. Your files are processed locally and never leave your computer.
How do I open a .zst file on Windows 11 or macOS?
Windows and macOS do not natively support Zstandard extraction. Instead of installing heavy third-party command-line utilities or unvetted software extensions, you can drop your archive directly into unpk.app for an instant web-based solution.
What is the difference between a .zst file and a .tar.zst file?
A standalone .zst file represents a single file compressed directly via the Zstandard algorithm. A .tar.zst file is a combined collection of multiple folders and files grouped into a Unix TAR archive and then compressed with Zstandard.
Is there a file size limit for extracting Zstandard archives here?
No. Thanks to our advanced streaming chunk architecture and the browser File System Access API, large developer archives (including 5GB+ dumps) are streamed and decompressed directly onto your local drive slice-by-slice without crashing your tab.