A .7z file is 7-Zip’s own archive format. People ship large downloads in it because it squeezes files down smaller than a plain .zip can.
Opening a .7z file on Windows 11
Since version 23H2, File Explorer extracts .7z files natively, along with .rar and .tar. It runs on an open source library called libarchive that is built into Windows.
- Right click the .7z file.
- Choose Extract All.
- Pick a destination folder and confirm.
You can also double click the file to browse what is inside without extracting everything.
That same native support covers .rar files too, so one Windows update handles both formats.
No extra software is needed, as long as Windows is on 23H2 or later and the archive has no password.
Windows 10 has no built in support
Windows 10 never gained native .7z support. The free, open source 7-Zip app from 7-zip.org is the standard fix, and it also handles encrypted and split archives on any version of Windows.
- Download 7-Zip from 7-zip.org.
- Install it.
- Right click the .7z file, choose 7-Zip, then Extract Here or Extract to folder.
7-Zip is free, and it works the same way on Windows 10 and Windows 11.
Password protected .7z files
Windows’ built in extraction cannot open an encrypted .7z file. It shows an error saying encryption is not currently supported.
The fix is the same 7-Zip app mentioned above. It handles password protected archives on any version of Windows, as long as you have the password.
There is no way around a password you do not have.
Creating a .7z file on Windows 11
Windows 11 version 24H2 goes a step further and lets you create .7z archives, not just open them.
- Right click a file or folder.
- Choose Compress to.
- Select 7z from the list.
On 24H2 and later, Windows 11 is a two way tool for this format, not just a reader.
Opening a .7z file on Mac
The Mac’s built in Archive Utility does not open .7z files.
Two free apps fix that: Keka and The Unarchiver, both available in the Mac App Store. The guide to Keka walks through setup if you want the details.
Either app adds .7z support once, and every future archive just works.
Opening a .7z file on iPhone
The Files app on iPhone extracts .zip files, not .7z.
Some archiver apps in the App Store claim to handle .7z, but the tools built into iOS cannot do it. The more reliable route is to open the file on a computer first. Then move the contents back to your phone if you need them there.
Opening a .7z file on Android
Files by Google, the app most Android phones ship with, extracts .zip but not .7z.
ZArchiver is the practical fix. It’s a free app with over 100 million installs and more than a decade of history. It opens .7z along with most other archive formats.
When a .7z file arrives split into parts
Sometimes a .7z shows up as numbered pieces: .7z.001, .7z.002, and so on.
That is one archive cut apart, usually so it fits a size limit for upload or email.
- Keep every numbered part in the same folder.
- Open only the .7z.001 file, using 7-Zip.
- 7-Zip reads the rest of the parts automatically.
Do not try to open .002 or .003 directly. Always start from .001.
Only extract archives from people you trust. A .7z from an unknown sender can hide malware, and the moment you extract it is the moment that malware lands on your disk.
FAQ
What is a .7z.001 file?
It’s one part of a .7z archive that has been split into pieces, usually to fit a size limit for upload or email. Keep it beside .002, .003 and so on, and open the .001 file to read the whole set.
Is .7z better than .zip?
A .7z archive generally compresses smaller than the same files zipped, which is why large downloads often ship that way. Whether it matters to you depends on file size versus convenience, since almost anything opens a .zip file without extra software.
How do I open a password protected .7z file?
Install the free 7-Zip app and open the archive there with the correct password. Windows’ built in extraction cannot open an encrypted .7z at all, so it will not even ask.
Can Windows 10 open .7z files without 7-Zip?
No. Windows 10 has no native .7z support of any kind, so the free 7-Zip app from 7-zip.org is required.