ZIP to 7Z
Initializing... drag & drop files here
Supports: ZIP
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
Reset to defaults
Need help?How to Convert ZIP to 7Z
- Upload your ZIP file — Click "+ Add Files" or drag and drop your ZIP archive.
- Set combine mode (optional) — Under "Combine?," choose "Single Archive" to merge all into one 7Z, or "Individual Archives" to create separate 7Z files.
- Convert and download — Click "Convert" and download your 7Z file.
Why Convert ZIP to 7Z?
7Z uses LZMA2 compression — achieving 30–70% better compression ratios than ZIP's DEFLATE. Converting ZIP to 7Z is ideal for reducing archive size for storage or transfer, archiving large file collections with maximum compression, or taking advantage of 7Z's AES-256 encryption for sensitive data.
The trade-off is that 7Z requires 7-Zip or compatible software to open, while ZIP is natively supported by all operating systems.
ZIP vs 7Z Comparison
| Property | ZIP | 7Z |
|---|---|---|
| Compression | DEFLATE | LZMA2 |
| File size | Larger | 30–70% smaller |
| Native OS support | Windows, macOS, Linux | None (needs 7-Zip) |
| Encryption | ZipCrypto, AES-256 | AES-256 |
| Common use | Universal sharing | Maximum compression |
Frequently Asked Questions
Will the 7Z be much smaller than the ZIP?
Yes, typically 30–70% smaller. LZMA2 compression is significantly more efficient than ZIP's DEFLATE.
Can I merge multiple ZIP files into one 7Z?
Yes. Upload multiple ZIP files and select "Single Archive" to combine all contents.
Can I create individual 7Z files?
Yes. Select "Individual Archives" to create a separate 7Z for each uploaded ZIP.
Does 7Z support encryption?
Yes. 7Z supports AES-256 encryption — stronger than ZIP's default ZipCrypto.
What software opens 7Z files?
7-Zip (Windows), Keka (macOS), p7zip (Linux), PeaZip (cross-platform), and WinRAR.