7-Zip
Open sourceIgor Pavlov
- Category
- Archivers
- Version
- 26.03
- Size
- ~2 MB
- Licence terms
- Open source (LGPL) · free for personal and business use
- Supported OS
- Windows 11 · 10
- Install method
- Automatic install supported
- Developer
- Igor Pavlov
- Downloads via this site
This links to Igor Pavlov’s own download source. AfterFormat neither stores nor modifies installer files.
What it is
An open-source archiver. It has no ads, no bundled software and no licence restrictions of any kind — personal or commercial. Its own 7z format compresses smaller than zip, and it opens essentially every archive format in common use.
When to pick this
When you want zero ads and zero licence ambiguity, especially on a company PC. If you often open archives created on older Korean systems, Bandizip handles the filenames better.
Details
Compression ratio
The 7z format is typically 20–30% smaller than zip for the same content, at the cost of slower compression.
No ads, no bundles
The installer contains nothing but the program. There is no checkbox to watch for.
Plain interface
The window looks dated and Korean filename repair is weaker than Bandizip’s. Right-click integration covers most daily use.
Distribution
- winget ID
- 7zip.7zip
- Redistribution policy
- Open source licence
- Last checked
- 2026-09-09
- Official site
- https://www.7-zip.org/
