What is a 7-Zip file?

7-Zip is the high-compression archive format built around LZMA/LZMA2. It typically produces smaller archives than ZIP or RAR, and is a common choice for shipping binary releases and large source bundles.

No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.

Does it work on mobile?

Yes. The viewer is mobile-first and works on phones, tablets, and desktops.

Can I extract a single entry?

Yes. Click any file in the tree and use Extract to download just that entry, or Open in to route it through a dedicated viewer (PDFs, images, code, and so on).

Archives.7z

7-Zip viewer

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7-Zip · .7z

Open 7-Zip files

7-Zip archive (high compression).

Choose a fileor paste · ⌘V

About 7-Zip

7-Zip archive (high compression).

7-Zip is the high-compression archive format built around LZMA/LZMA2. We use libarchive compiled to WebAssembly to walk the directory tree, decode individual entries on demand, and pipe each one into a dedicated viewer — no native 7-Zip install required.

FAQ

What is a 7-Zip file?: 7-Zip is the high-compression archive format built around LZMA/LZMA2. It typically produces smaller archives than ZIP or RAR, and is a common choice for shipping binary releases and large source bundles.
Is my file uploaded?: No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.
Does it work on mobile?: Yes. The viewer is mobile-first and works on phones, tablets, and desktops.
Can I extract a single entry?: Yes. Click any file in the tree and use Extract to download just that entry, or Open in <Viewer> to route it through a dedicated viewer (PDFs, images, code, and so on).

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