Extract 7z archives — no upload, no 7-Zip install
7z files come from 7-Zip and show up wherever compression ratio matters — large game mods, datasets, software collections, and long-term backups often ship as .7z because LZMA compression squeezes them noticeably smaller than ZIP. The catch: Windows only gained native 7z support recently, and macOS still can’t open them out of the box. This page extracts 7z archives directly in your browser using libarchive compiled to WebAssembly — the same open-source library behind macOS’s own archive handling. Every file inside becomes an individual download, with the original folder structure shown in each file’s path, and larger archives get a convenient download-all button. Your archive is processed entirely on your own device; it is never uploaded, so that multi-gigabyte download or private backup stays exactly where it is.
How it works
- Drop a .7z archive below (or click to browse for one).
- Wait a moment while it is decompressed on your device — LZMA takes a little longer than ZIP.
- Download files individually, or everything as a single ZIP.
Frequently asked questions
Why do big downloads use 7z instead of ZIP?
7z’s LZMA and LZMA2 compression typically produces meaningfully smaller archives than ZIP’s older deflate algorithm — often 20–40% smaller for compressible content. For anyone distributing gigabytes of files, that saves real bandwidth, which is why 7z is popular for game mods, datasets, and software bundles.
Do I need 7-Zip or WinRAR installed?
No — that is the point of this page. The decompression happens in your browser, so it works the same on Windows, macOS, Linux, ChromeOS, or a tablet, with nothing to install and no admin rights needed.
What about password-protected 7z archives?
Encrypted 7z files are not supported in this version. If your archive was created with a password, extraction will fail here and you will need a desktop tool such as 7-Zip itself.
The archive I downloaded is several gigabytes — does it get uploaded somewhere first?
No, and with files that size you would notice: an upload-based extractor would spend minutes just transferring it. Here there is no transfer at all — the archive is read straight from your disk and decompressed in your browser’s memory. The only real constraint is your device’s RAM.