Open and extract 7z files in your browser

Choose a .7z file to see its contents and save the files you need. The archive is read on your device with the official 7-Zip engine and is never uploaded.

1. Choose a .7z file from your device. The 7-Zip engine (about 1.6 MB) loads only at this moment.
2. If the archive is password-protected, type the password and press Unlock. The password never leaves your device.
3. Press Extract next to a file. 7-Zip verifies its CRC before you save it.
4. Split archive? Select every part (.7z.001, .7z.002 …) in the file picker together; the order does not matter.

What the 7z tool on this page will open

7z is the native archive of 7-Zip. It usually compresses with LZMA or LZMA2, and it can also store PPMd, BZip2 or Deflate. Unlike ZIP, a 7z archive is often solid: many files share one compression block, which saves space and makes a single damaged byte more expensive. This page uses the official 7-Zip engine compiled to WebAssembly. It lists the archive, shows a lock icon on encrypted entries, and can extract AES-256 entries after you type the password, including archives whose file names are encrypted. The practical ceiling in the browser is about 1 GB for one extracted file. Larger output is refused so the tab does not die silently.

Split sets use the names name.7z.001, name.7z.002 and so on. The file picker accepts several parts at once. Select every part in one go. A lone .001 file is not a complete archive, and the engine cannot invent the missing volumes. The dedicated walkthrough is open split 7z archives.

Steps that match the controls on this page

1. Choose the .7z file. If the set is split, highlight every numbered part before you confirm. Order on disk does not matter; the names do.
2. Read the list. A lock means that entry is encrypted. Directories are marked so you do not try to save a folder as if it were a document.
3. Press Extract on a file. If a password is required and the box was hidden, it appears. Type the password and press Unlock, then extract again. The password is used only inside this tab. It is not written to the server and it is not a good thing to paste into a contact form.
4. Save the download. Check the size against the size shown in the list. A short download of the result is a browser interruption, not a successful extract.
5. If you see "wrong password", assume the password is wrong or has a trailing space before you assume the file is corrupt. Passwords are case sensitive. Ask the sender on a channel other than the same message that carried the file.

Limits you should believe

• One gigabyte per extracted file. The compressed archive can be smaller than that and still expand past the limit. Extract a different entry, or use desktop 7-Zip for the oversized one.
• Solid archives. Extracting a file near the end of a solid block can take as long as extracting everything before it. That delay is normal. Solid compression explained shows why, and why a CRC error late in the archive often ruins the files after the damage.
• Unsafe paths. Entries that would write outside the destination are blocked. Do not rename your way around that. It is the same class of check the RAR and ZIP tools apply.
• Not every "7z" file is 7z. People sometimes rename a RAR or a ZIP. If the engine rejects the file immediately, try the other tools or read archive file extensions.

Your file stays on the device

The 7-Zip engine runs in the page. The archive, the password and the extracted bytes are not uploaded to UnpackNest and are not part of any advertising request. Google AdSense, if ads are enabled, does not receive file names or file contents. The privacy policy names AdSense, third-party vendors, the DoubleClick cookie and the pages where you can change Google ad settings.

Questions about opening 7z here

The password box never appears.

The archive may not be encrypted, or only some entries are. Extract an unlocked row first. If every row fails with a password error, the header itself is encrypted and the box should show. A header password protects the names; you will not see a useful list until Unlock succeeds.

I only need one PDF from a huge 7z.

You can press Extract on that row alone. On a solid archive the engine may still have to decode earlier data, so time is not the same as "download size". Extract one file compares ZIP, RAR and 7z on this point.

Does this work on a Chromebook?

Chrome on a Chromebook runs the same page. The Files app will not open 7z by itself. Open archives on a Chromebook covers ZIP, RAR, 7z and the Linux container.

Should the sender have used 7z?

7z is a good choice for size and for AES-256, and a poor choice when the recipient has only a phone with no extractor. 7z versus ZIP versus RAR and how to open 7z files are the longer guides.