Convert 7Z to ZIPRight in Your Browser

7z is a genuinely good format — open, free, and typically tighter compression than ZIP thanks to LZMA — but it shares RAR's practical flaw: no operating system opens it out of the box. Send a .7z to a colleague and you're also sending installation instructions. ZIP trades a few percent of compression for the ability to double-click open on every desktop since Windows XP (2001).

This converter unpacks your archive in the browser and rebuilds it as a standard ZIP, preserving file names, folder hierarchies and paths exactly. It also accepts TAR and TAR.GZ — the Unix bundling formats that Windows recipients famously struggle with — making it the general "make this archive open everywhere" tool. (RAR has its own page.)

Expect the ZIP to be somewhat larger than the 7z original: LZMA usually out-compresses ZIP's 1993-era Deflate, and undoing that is the cost of compatibility. For your own backups and storage, 7z remains the better container; convert when the archive needs to travel to people whose software you can't control. Encrypted archives aren't supported — decrypt before converting.

Everything runs client-side via a WebAssembly build of libarchive: your archive is extracted and repacked in your tab's memory, not on a server. For archives — which tend to contain whole projects at once — that's the only arrangement that doesn't require trust.