Create a 7Z from Your Files
Make a 7Z file online for free without installing anything. Pack files into one 7Z, smaller than ZIP, no upload, no account, works with your WiFi off.
Drop files here
or
Max 500 MB total for one 7Z · Secure and private, files are never stored
How it works
- 1Drop the files you want to pack into the box
- 2Pick a compression level, store, standard, or best
- 3Click "Create 7Z", packed by the real 7-Zip engine in your browser
- 4Download the archive; the result shows size before and after
7Z or ZIP: which one should you send?
Think of a 7Z as a tighter suitcase: the same clothes, packed smaller. The 7-Zip squeeze usually beats the ZIP squeeze, so the same files often land around 30 to 50 percent smaller as a 7Z. Use 7Z when the size matters, for example when an email refuses your attachment. Use ZIP when you are not sure what the other person can open, because a ZIP opens everywhere with no extra software.
Which files shrink the most?
Text, code, spreadsheets and other document files squeeze a lot. Photos, videos and music barely shrink, they were already squeezed when they were created. The result screen shows your exact numbers, size before and after, so you always know what you got. If your files barely shrink, pick Store next time, it packs just as well without spending minutes trying.
Your files never leave your device
Everything happens inside your browser. Your files are read from your computer, packed into the 7Z right there, and saved straight to your downloads. Nothing is uploaded anywhere, and there is no account. This also means the tool does not add a password: anyone who gets the file can open it, so send anything private through a secure channel instead.
Need a different result?
If the person you send files to may not open a 7Z, use Zip Files instead, a ZIP opens everywhere. To pack a whole folder with its subfolders, use Zip a Folder. Received a 7Z and need the files inside? Open it on Extract 7Z.
Frequently asked questions
How do I make a 7Z file online for free?
Drop your files on this page, pick a compression level, and click Create 7Z. The archive is made in your browser and downloads straight to your computer. It is completely free: no account, no watermark, and the only limit is the honest 500 MB total that fits in a browser.
Do I need to install 7-Zip?
No. This page runs the real 7-Zip engine, compiled to run inside your browser. You get the same packing quality as the desktop program without installing anything and without admin rights, handy on school and work computers where installs are locked.
Does this tool work if I turn off my WiFi?
Yes. Turn off your WiFi, this tool will still run 100% locally. Once the page has loaded, every step happens on your own computer: the files are packed there and saved to your downloads. You can test it yourself, the archive still comes out fine.
Can the person I send it to open a 7Z file?
On Windows 11, yes, File Explorer opens 7Z files directly. On older Windows and on macOS, the free 7-Zip app, Keka or The Unarchiver open them. If you cannot be sure what they have, Zip Files is the safer choice, a ZIP opens on every computer and phone.
Why did my 7Z come out almost as big as my files?
Because those files were already squeezed before you packed them. Photos, videos, music and most PDFs cannot shrink much more. The packing still worked: everything is in one file, ready to send. For this kind of content, Store is the faster choice and gives the same result.