If the archive contains only one file, it is downloaded right away.
Most online extractors upload your archive to a server. This one does not: the extraction runs in your browser with libarchive, the same open-source library used by many operating systems, compiled to WebAssembly. Your files and passwords never leave your computer or phone.
When a ZIP file is encrypted, the page asks for the password and decrypts the files locally. Encrypted RAR and 7z archives cannot be opened in a browser; the page tells you when that happens, and you need WinRAR, 7-Zip, Keka or The Unarchiver.
Open this page in Safari or Chrome, tap Browse and pick the archive from Files or Downloads. Extracted files are saved to your Downloads (on iPhone: Files › Downloads). This is the easiest way to open RAR and 7z files on a phone, which cannot open them on their own.
Windows, macOS, iOS and Android all open ZIP files on their own, and Windows 11 (version 23H2 and later) also opens RAR, 7z and TAR files in File Explorer. This page helps when the built-in tool cannot open the format, when you only need a few files from a big archive, on a computer where you cannot install software, and on phones and tablets.
There is no fixed limit, but the whole archive and its contents must fit in the memory your browser allows. Archives up to a few hundred megabytes work well on most computers.
The page can repack the files you choose into a ZIP with Download all as ZIP. It does not create RAR or 7z archives.
Open them one after the other: drop the next archive on the box when you are done with the first.