When handling compressed files in Windows, basic decompression alone is often insufficient. 7-ZipIt is a free and open-source (GNU LGPL) compression utility that can be used for free on any personal or company computer without registration.
1. Key Features
- 7z format(LZMA·LZMA2 compression): Compression ratio 2–101 TP³T or more smaller than ZIP, usually 30–501 TP³T smaller.
- Format Support: Compression/Decompression supports 7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM — Decompression supports over 30 formats including RAR, ISO, CAB, etc. (RAR can only be decompressed)
- AES-256 encryption: Securely store and transmit important documents by password-protecting compressed files
- Self-extracting compression (.exe), Windows right-click menu integration, built-in file manager, command-line version, support for 87 languages
2. Precautions when downloading
- The official website is 7-zip.orgDo not download installation files with names like '7-Zip Pro', '7-Zip 26 full', or 'Activated Version', as they are fake advertisements and malware phishing attempts. (The legitimate 64-bit installation file is very lightweight at approximately 1.6MB.)
- As of September 2026, the latest version is 26.03(Released on September 3). Please download and use the new version from the official website.
3. Basic Usage
- Compression: Select file/folder → Right-click → 7-Zip > Add to compressed file → Format (7z recommended) and set a password, then OK
- Extract: Right-click the compressed file → 7-Zip > Extract here
- If a compressed file is sent by an unknown person, check the preview, do not open it, and delete it.
Source: Analytics Insight '7-Zip Explained' (2026.09)
https://www.analyticsinsight.net/technology/7-zip-explained-features-compression-encryption-how-it-works
Windowstan '7-Zip 26.02 for Windows Free Download''
https://windowstan.com/software/7-zip/
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