01
ADD YOUR ZIP
Drop the ZIP file into the box above or choose it from your device.
ZIP → 7Z / online converter
ZIP to 7Z Converter
Convert a ZIP archive to 7Z to make it smaller for storage, backups or large downloads.
01 / how to
How to convert ZIP to 7Z
02
CONVERT TO 7Z
7Z is already selected. Press Convert and wait a few seconds.
03
DOWNLOAD
Save the finished 7Z file. The original is deleted from our server.
02 / what you get
What happens to your data
Kept
- Folders (including empty ones) and file names in any language, such as Cyrillic or Polish, are kept
- File dates and Unix permissions are kept, so a script that was executable stays executable
- Tight LZMA2 compression, usually the smallest result of all archive formats here
Good to know
- Password-protected ZIP files are not supported.
- Windows and macOS cannot open 7Z by themselves. The receiver needs 7-Zip, Keka or similar software.
- Big archives take noticeably longer to pack as 7Z than as ZIP or TAR.GZ.
- The size gain depends on the files: photos, videos and other already compressed files shrink very little.
- Links (shortcuts) and special files inside the archive are left out. Only real files and folders are converted.
- Archives up to 300 MB are accepted. An archive that unpacks to more than 500 MB or 20,000 files is refused.
03 / formats
ZIP vs 7Z
ZIP
A ZIP file bundles multiple files and folders into one compressed archive — the most universal archive format, readable natively on Windows, Mac, and Linux without installing anything extra.
Used in: File sharing · Software downloads · Email attachments
7Z
A 7Z file is the archive format of the 7-Zip tool. It usually compresses tighter than ZIP, which makes it popular for large downloads and backups, but Windows and macOS can't open it without extra software.
Used in: Large downloads · Backups · Game mods & software
04 / more
More conversions
From ZIP
Have a different file? Open the main converter — it detects the format for you.