Open and extract a 7Z file online
Open a .7z file in your browser, check what it contains, and download everything or only the files you tick, without installing 7-Zip.
or click to select it
It reads the 7z with libarchive compiled to WebAssembly, which loads the first time you open an archive. When you extract, a single file downloads as-is; several files are delivered inside a new ZIP that keeps their folder paths, because a browser can't create folders on your disk.
Use cases
- Opening a downloaded 7z on a computer where you can't install 7-Zip.
- Checking a 7z's contents before saving it.
- Extracting just some files from a large 7z.
How it works
- 1
Upload the 7Z
Drag it in or pick it from your device (up to 50 MB).
- 2
Click "Open 7Z"
You'll see every file with its path and size, plus a summary of files, folders and total uncompressed size.
- 3
Download what you need
"Extract all" downloads the full contents; if you tick boxes, "Extract selected" downloads just those files.
Technical details
- Limits: 50 MB input file, at most 2,000 entries and 300 MB in total once decompressed.
- Password-protected 7z files aren't supported yet; you'll see a clear notice instead of a half-working result.
- Read-only: you can extract or convert to ZIP, but not create a new 7z.
- Entries with unsafe paths ("../", absolute paths or drive letters) are dropped and never downloaded; empty folders aren't included in the download.
Frequently asked questions
Can I view the contents without extracting anything?
Yes. The button only shows the file list with sizes; nothing downloads until you choose "Extract all" or "Extract selected".
Does it work with password-protected 7z files?
Not yet. If the archive is encrypted, the tool detects it and shows a notice instead of trying to extract it.
Why is it slower the first time?
The 7z decompressor is a WebAssembly module that's only downloaded when you need it. Your file isn't sent anywhere: what downloads is the program that reads it.