Portable 7-Zip

This is the portable version of the well-known compression tool, 7-Zip. Since it doesn't need to be installed, Portable 7-Zip will not make any changes to your Windows registry entries and you can store it on any external device to run it on any computer.

Choose file formats to associate with

The user interface of the program is simplistic and easy to navigate through, thanks to the file browser. All you have to do is select a file or folder that you want to compress, press the "Add" button, configure the archiving settings, and initiate the process.
By default, 7-Zip Portable supports the 7Z, TAR, WIM and ZIP archive formats, but you can configure shell extensions in the "Options" menu (e.g. 001, ARJ, CAB, ISO, RAR).
You can set the compression level (from "Store" to "Ultra"), compression method, dictionary and word size, solid block size and the number of CPU threads.

Calculate file checksum, append, update, add comments, and more

In addition, you can select the update mode ("Add and replace size", "Update and add files", "Freshen existing files", "Synchronize files") and optionally split to volume, input parameters, create a SFX archive, compress shared files or password-protect the archive.
You can also calculate the checksum of a file, add comments, change the viewing mode, create and organize favorites, as well as use a benchmarking option (view compressing and decompressing speed, CPU usage, rating and usage).
The program consumes a very low amount of system resources and it can be used by both beginners and experts.

In conclusion

All in all, 7-Zip Portable is an excellent tool for compressing files and we strongly recommend it to all users. You can easily carry it around on a USB flash drive to have its capabilities at hand regardless of the computer you’re working on.
Portable 7-Zip is part of these download collections: Open RAR, Make 7z