Every “unzip online” site takes your archive, opens it on their
server and shows you a list. People do this with backups, phone exports and
whole projects without thinking about what they have just handed over. This one
reads the archive where it already is — on your machine.
1. Open an archive
Drop a .zip here, or click to chooseNothing is uploaded — it is read inside this tab
2. Take what you want
Preview
1. Choose the files
Drop files here, or click to chooseThey are packed in this tab — nothing is uploaded
Is this actually private?
The honest notes
Nothing is uploaded. Static page, no endpoint, no account. The archive is read from disk into this tab and anything you extract is written back out of it.
The list costs nothing. A ZIP keeps an index of its contents at the end of the file, so what is in a 500 MB archive can be shown without unpacking any of it. Only the files you actually ask for are decompressed.
A path inside an archive is not to be trusted. Nothing in the format stops a file being named ../../../.ssh/authorized_keys, and extractors that join that to a folder without checking write outside it — an old bug that still catches people. Names are flattened to their last part here, so an entry cannot choose where it lands, and the page says when an archive contains one.
It reads ordinary ZIPs and says so when it cannot. Stored and deflated entries, which is what every normal archive contains. It does not read password-protected entries, ZIP64 archives (over four gigabytes or 65,535 files), or the rarer compressions like bzip2 and LZMA — and it names which of those it hit rather than producing a broken file.
RAR and 7z are different formats. They are not ZIP with a different extension, and nothing here reads them. A .docx, .xlsx, .pptx, .epub, .jar and .apkare ZIPs, and open here fine — which is a good way to see what an Office document is really made of.
The compression is the browser's own.DecompressionStream is built in and is exactly the algorithm ZIP uses, so there is no decompressor here to get wrong and nothing extra to download. The whole tool is under seven kilobytes.
It works in memory. Everything is held in the tab, so a very large archive can run one out of memory. Extracting a few files at a time is the fix.