What is nanazip?

NanaZip is a free, open source file archiver for Windows that can compress, decompress, and manage archives in dozens of formats. It started as a fork of the widely used 7-Zip tool, so it inherits the same broad format support, but it has been updated to feel native on modern Windows. The main things NanaZip adds on top of 7-Zip are a redesigned look and a set of extra capabilities. On the visual side, it supports dark mode throughout all its windows, and on Windows 11 it uses the Mica transparency effect that blends the window background with your desktop. It fits into Windows 10 and Windows 11 properly, with a right-click context menu in File Explorer and file association handling. Installation happens through the Microsoft Store or a downloadable MSIX package, the same modern packaging format that Microsoft uses for its own apps. Beyond the appearance, NanaZip brings a noticeably wider range of compression formats and hashing algorithms than the original 7-Zip. It can read and write formats such as Brotli, LZ4, Zstandard, and Lizard, which are popular in software development and web contexts. The built-in hash checker supports dozens of algorithms including SHA-3, BLAKE2b, SM3, and several others useful for verifying file integrity. There is also read-only support for some unusual archive types like Electron asar bundles, WebAssembly binary files, and several embedded filesystem image formats. Security has been tightened compared to the original: the binaries are compiled with Control Flow Guard and Control-flow Enforcement Technology to make certain kinds of attacks harder, and the software blocks loading libraries from unexpected locations at runtime. NanaZip runs on Windows 10 (Build 19041 or later) and Windows 11, on both x64 and ARM64 machines. The project is maintained by Kenji Mouri and welcomes contributions from the community. There is also a Sponsor Edition available through the Microsoft Store for those who want to support ongoing development.