How to open RAR, 7z and ZIP files without installing anything

Windows opens ZIP files natively, and that is where the built-in support ends. RAR needs WinRAR, 7z needs 7-Zip, a phone needs an app full of ads — all to look inside one attachment.

Extract in the browser

1. Open Unzip online and drop the archive: ZIP, RAR (v4 and v5), 7z, TAR, TAR.GZ, BZ2, XZ, even ISO and CAB.
2. If it is password-protected, enter the password once.
3. Tick the files you want and download them — one at a time, or several packed into a single ZIP.

The archive is read by libarchive compiled to WebAssembly; it never leaves your computer or phone. That makes this a safe way to peek inside a suspicious attachment: nothing is executed, you only see the file list.

Files you get from an archive

Extracted photos and PDFs are often oversized because whoever zipped them never compressed the contents. Two tools cover most cases:

Limits

• Multi-part archives (.part1.rar, .z01) are not supported — you need the whole set combined first.
• Very large archives depend on device memory; 1 GB is the practical ceiling in a browser.