How to convert ZIP to 7Z
- Add your .ZIP file - drop it in the box above or click to browse.
- Convert it to .7Z in a few seconds.
- Download your new .7Z file.
What to expect
- The conversion is lossless - every file in the
ZIPis repacked into7Zbit-for-bit identical to the original. - For already-compressed files (
JPEG,MP4,PDF), size savings overZIPare minimal; the biggest gains come from text, code, and raw data. .7Zrequires 7-Zip or a compatible tool on most platforms - keepZIPfor casual sharing, use7Zfor storage or long-term archiving.
Frequently asked questions
Is converting ZIP to 7Z lossless?
Yes. Both formats use lossless compression, so every file comes out bit-for-bit identical to the original.
Will the 7Z always be smaller than the ZIP?
Not always - LZMA2 beats DEFLATE significantly for text and code, but for already-compressed content like
JPEG or MP4 the difference is under 1%.Can I open a 7Z file without extra software?
Windows 11 (build 23H2 and later) can open
.7z natively; earlier Windows and macOS require 7-Zip, PeaZip, or a similar tool.Does 7Z offer better password protection than ZIP?
Yes - 7Z uses AES-256 and can hide the internal file list too, while ZIP's built-in ZipCrypto is weak and easily cracked.
Programs that convert ZIP: 7-zip · ALZip · PeaZip · ALZip for Mac · EZ7z for Mac · sArchiver · StuffIt for Mac · StuffIt Deluxe for Mac
