TonySkill

ZIP to 7z

Recompress a ZIP as 7z to save space, with optional AES-256 encryption of files and file names.

Processed on your device — nothing is uploaded.

ZIP, RAR, 7z, TAR, GZ, BZ2, XZ, ISO, CAB… Multi-part archives: drop all the parts together.

First use: the 7-Zip engine (1.7 MB) is downloaded once, then kept by your browser.

How to convert ZIP to 7z

  1. Drop your ZIP file above.

  2. Choose the compression level and a password if needed.

  3. Click Convert to 7Z and download the archive.

Good to know

In one step
No need to extract then recompress: drop the archive, pick the format, done.
Passwords handled
Open a protected archive with its password and, if you like, protect the new one with another.
Nothing is uploaded
Conversion happens in your browser: the archive's content stays on your device.

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