Create 7Z archives.
Build 7Z archives in your browser — small, AES, private.
Drop any files here
or browse your files
Paste with ⌘V · or drop files anywhere on the page
Files never leave your device. Everything runs in your browser, nothing touches a server — tools you've used even work offline.
7Z out-compresses ZIP on almost everything and encrypts with AES-256 when you set a password — it can even hide the file names inside. Drop any files, pick a compression level, download one .7z. The whole build runs locally, so your files never leave the machine.
How it works
- Drop files anywhere on the page, click to browse, or paste with ⌘V.
- Pick a quality or preset — or set an exact target size and let the tool find it.
- Compress, compare before/after, and download — individually or as a ZIP.
7Z or ZIP — a one-line decision
Sending to an unknown recipient or a web form: ZIP, because everything opens it. Archiving for yourself, moving big text-heavy folders, or encrypting properly: 7Z. Already have a ZIP and want it smaller? ZIP to 7Z repacks it; the reverse trip is 7Z to ZIP.
Frequently asked questions
How is 7Z better than ZIP?
Stronger compression (LZMA2 with a real dictionary vs per-file deflate), solid archiving that exploits similarity between files, and proper AES-256 encryption with optional hidden file names. The trade-off is compatibility: recipients need 7-Zip, Keka or another modern unarchiver.
How does the password protection work?
Set a password and the archive encrypts with AES-256 as it is built — on your device, so the password never travels anywhere. Tick "hide file names" and even the list of contents is unreadable without it.
Which compression level should I pick?
Balanced is right for almost everything. Max squeezes a few extra percent out of text-heavy content at a real speed cost; Store skips compression entirely — the right call when the inputs are already-compressed photos or video and you only want one file.
Is it private?
Yes. Archives are built and converted entirely in your browser — neither the archive nor the files inside it are ever uploaded, and any password you set is applied locally. The server does nothing but deliver this page. Want proof? Run one file through, switch your connection off, and run another — it still works.