7-Zip

About 7-Zip

7-Zip is the archiver that ends up on every machine eventually. The install is smaller than most application icons, it has no background service, no notification tray presence and nothing that phones anywhere, and it opens practically any archive that lands in a downloads folder. For a tool used several times a day, that lack of overhead is the feature.

Its own format is the reason to compress with it rather than merely extract. The LZMA2 compressor reaches ratios that leave the older ZIP format well behind, particularly on source code, documents and anything else with repeated structure, and it uses every available core in the process. Dictionary size, word size and solid block settings are all exposed for anyone who wants to trade memory for a smaller output.

The format list on the reading side is what makes it universal: ZIP, RAR, TAR, GZIP, BZIP2, XZ, ISO, CAB, WIM, DMG, MSI and a long tail of others. Disk images mount as browsable folders, installers can be opened rather than run to see what is inside them, and nested archives open one inside the other without extracting the outer layer first.

Practical touches accumulate over a long product life: split archives across a fixed volume size for awkward transfers, AES encryption with optional header encryption so filenames are hidden too, self extracting archive creation, a file manager with a dual pane mode, checksum calculation from the context menu, and full command line access for scripting a backup job.

What is included in this build

• High ratio LZMA2 compression using every available processor core
• Reads and extracts a very wide format list including ZIP, RAR, TAR, ISO, CAB and WIM
• Disk images and installers open as browsable folders rather than needing to be run
• Split archives across fixed volume sizes for awkward transfers
• AES encryption with optional header encryption to hide filenames as well as content
• Self extracting archive creation for recipients with no archiver installed
• Dual pane file manager with checksum calculation from the context menu
• Full command line interface for scripted archiving and backup jobs

Changed in version 26.02

• Improved compression speed on high core count processors
• Additional format support on the extraction side
• Better handling of very large archives above the previous size ceiling
• Context menu integration updated for the current shell
• Several extraction edge cases with unusual encodings corrected

Installation walkthrough

These steps assume a clean machine. If a previous release of the same application is present, deal with that first, since an overlapping install is the most common cause of a setup that stops halfway.

1. Remove any older build first so the shell integration registers correctly.
2. Extract the archive and run the installer as administrator.
3. Choose the 64-bit build unless the machine specifically needs 32-bit.
4. Open the options panel and associate the archive types that should be handled.
5. Enable the context menu entries you actually want and clear the rest.

System requirements and file details

Frequently asked about this title