Free · Private · No upload
Convert ZIP to 7Z online
Drop your .zip file below and get a .7z archive in seconds — processed entirely on your device, free and private.
No upload
Your bytes never leave this device.
Instant
No queue, no account, no waiting.
Private by design
No tracking on any tool page.
How to convert ZIP to 7Z
- 1
Add your .zip file — drop it into the tool or click to browse.
- 2
7Z is pre-selected as the output format; adjust compression options if you like.
- 3
Run the conversion and download the finished .7z archive.
About ZIP and 7Z
ZIP is the universal archive format that Windows, macOS and every phone open out of the box.
7Z offers the best compression ratio of the family, with optional AES-256 encryption.
Why convert ZIP to 7Z here?
- 100% private — conversion runs in your browser with WebAssembly; files never leave your device.
- Completely free — no sign-up, no watermarks, no per-file charges.
- Real re-packing, not renaming — the archive is unpacked and rebuilt as 7Z so the result opens cleanly.
Frequently asked questions
Will converting ZIP to 7Z lose my files?
No. The contents are extracted from the ZIP archive and re-packed into 7Z. File contents are not altered — only the container changes.
What if my ZIP file is password-protected?
Enter the password in the options panel and the converter will decrypt it locally during the conversion.
Is there a file size limit?
There is no server limit because nothing is uploaded. Very large archives use your device's memory, so keep huge files reasonable.
Are my files uploaded to a server?
No. The conversion happens entirely inside your browser — your files never leave your device.