.7z — 7-Zip Archive
A high-compression archive format commonly used for large bundles and software distribution.
About this format
7Z is the native archive format of 7-Zip. It is known for strong compression, optional encryption, and solid archive mode.
Use 7Z when compression ratio matters and recipients can install an extractor. Use ZIP for maximum casual compatibility.
Real-world samples & file sizes
7Z samples should be judged in the sizes people actually receive, upload, or export. These reference cards show the common shapes and settings to check before choosing a conversion target.
project backup
Checks nested paths, filenames, and extraction behavior.
large bundle
Shows why compression method and split archives matter.
source archive
Metadata and permissions are often more important than compression.
email attachment
Checks whether recipients can open it without extra tools.
Reference dimensions are platform-style targets. Compatibility and format facts are verified from the linked online sources below.
Pros
- +Strong compression
- +Supports encryption
- +Good for large bundles
Cons
- −Less universally built in than ZIP
- −Solid archives can make partial recovery harder
- −Some recipients need extra software
7Z vs other formats
| vs | Size | Quality | Note |
|---|---|---|---|
| ZIP | 7Z is often smaller | Both are archives | ZIP is more universally recognized. |
| TAR.GZ | Varies | Both are common archives | TAR.GZ is more Unix-native. |
Where it works
- Windows via 7-Zip/WinRAR
- macOS via The Unarchiver/Keka
- Linux via p7zip/7zz
- Browsers download 7Z; extraction needs app logic
- 7-Zip
- WinRAR
- Keka
- The Unarchiver
- PeaZip
Frequently asked questions
- Is 7Z better than ZIP?
- For compression ratio, often yes. For recipient compatibility, ZIP is safer.
- Can 7Z be encrypted?
- Yes, 7Z supports AES encryption when created with compatible tools.
Sources
- 7-Zip 7z format - official 7z format features
- Library of Congress file format descriptions - archival format descriptions and sustainability notes