I used 7-Zip for fifteen years. The interface never changed. The compression ratios never improved. The integration with Windows never got better. Then I tried NanaZip, a free open-source archiver forked from 7-Zip with a modern Windows 11 interface. After six months of daily use, I am not going back. The trade-offs are real (some advanced features are still missing, the project is younger than 7-Zip), but the user experience improvement is real enough that I am switching for good. This is the honest comparison.
Why 7-Zip stopped being enough for me
7-Zip is the workhorse of free file archivers. The compression ratio is the best you can get from a free tool. The format support is broad: 7z, zip, rar, tar, gz, iso, and most of the long tail. The price is right at $0. The interface is from 2007. The Windows context menu integration works but is unstyled. The settings dialog looks like a Unix tool from the early 2000s, and Windows users notice.
None of this matters for a power user who lives in the command line. For a household where my partner also unzips files, the unstyled interface is friction. The 7z format is technically superior, but the .zip format is what gets sent to people. The 7-Zip interface for .zip files is the same as for .7z files, which is a small thing that adds up. Every unzip takes a few extra clicks and a few extra seconds of cognitive load. Over a year, that is real time.
The breakage point for me was the Windows 11 “Extract All” button. Microsoft built it to use the system zip handler, which on a stock Windows 11 install is the built-in zip support. If you install 7-Zip, the built-in zip handler gets replaced. The button still works. The dialog that pops up is the 7-Zip dialog, which is functional and ugly. I want a button that just works and a dialog that does not look like it escaped from a 2007 Linux desktop.
What NanaZip does better
Headline: the interface. The Windows 11 context menu integration is styled, dark-mode aware, and consistent with the rest of the Windows shell. The drag-and-drop extraction is real: drop a .zip on the desktop, get an extracted folder, no dialog. The settings dialog is modern, with tabs and toggles and a search bar. The compression ratio is the same as 7-Zip, because it is the same code. NanaZip is a fork of 7-Zip, not a rewrite. The format support is broader: RAR5, Zstandard (a modern compression algorithm that is faster than zlib), and Brotli (Google’s compression algorithm, common for web assets) are all first-class. The performance is the same as 7-Zip on the same hardware. The integration with the Windows File Explorer’s “Extract” button is what my partner uses, and it works without opening a separate app.
Dark mode is the small thing that matters. 7-Zip does not respect Windows dark mode. NanaZip does. When I am unzipping files at 11pm, the dark mode is the difference between “I notice the unzip dialog” and “I do not.”
Small things that add up over months of daily use:
- Drag-and-drop extraction. Drop a .zip on the desktop, get a folder, no dialog. The 7-Zip version requires the right-click menu.
- Modern context menu styling. The right-click “Extract” entries are styled to match Windows 11, with icons and a hover state. The 7-Zip version is the system default, which is unstyled.
- Settings dialog with a search bar. When I am looking for a specific option, the search bar is faster than scrolling through 7-Zip’s tabbed dialog.
- Built-in format detection for RAR5, Zstandard, and Brotli. No separate codec install. 7-Zip needs the optional codec pack for RAR5.
What NanaZip does worse
Three things to know before switching.
- The project is younger and smaller than 7-Zip. The bug tracker has more open issues. Some advanced features (self-extracting archives, multi-volume archives) are still in development. The release cadence is monthly, not the years-long gaps 7-Zip sometimes goes through.
- The documentation is in Chinese first, English second. The translations are improving, but the gap is real. If you need a specific command-line option, expect to read the Chinese docs or read the source.
- Some of the 7-Zip command-line options are not exposed. If you script 7-Zip in a build pipeline, the switch to NanaZip is a port. The CLI is mostly compatible, but the edge cases are not.
For the 95% of users who use the GUI, none of this matters. For the 5% who script it, expect a porting effort. The good news is that the GUI is the actual product most people care about, and the GUI is better than 7-Zip’s on every dimension that matters.
The trade-offs that are real
NanaZip is a fork, not a rewrite. It uses the same LZMA and LZMA2 compression engine as 7-Zip. The .7z files it produces are bit-for-bit compatible. The .zip files are .zip files. The interface is new. The compression is not.
The trade-off: you get a better interface for the same compression ratio. The risk: NanaZip is a smaller project. If the maintainer stops working on it, you can fork. The 7-Zip codebase is older and more battle-tested, and 7-Zip will be around in 10 years. The NanaZip codebase is younger but more actively developed, and the future of the project depends on one or two people.
The right way to think about it is as a risk-adjusted bet on the maintainer. If you use 7-Zip in a personal context, the worst case is you re-install 7-Zip. If you use NanaZip in a personal context, the worst case is the same. If you use either in a business context with 50 machines, the risk calculation is different and you should be testing both anyway.
The fit for most people
If you are a casual user who unzips the occasional download, the default Windows 11 zip support is fine. The built-in zip handler is good enough for one-off .zip files. If you are a power user who cares about compression ratios and format support, 7-Zip is fine. If you want the modern Windows 11 interface and the broad format support without the 2007 aesthetics, NanaZip is the upgrade.
The price is the same ($0 for all three). The compression ratio is the same between 7-Zip and NanaZip. The interface is the only difference. For most households, the interface is the difference that matters. The 7-Zip context menu is functional. The NanaZip context menu is functional and pleasant to look at. Over a year of daily use, the small pleasure adds up.
What I would tell past me
If I could send a message back to the version of me that installed 7-Zip for the fifteenth time, I would say three things.
- Try NanaZip on day one of using Windows 11. The context menu integration is what you actually interact with 90% of the time, and NanaZip’s is better than 7-Zip’s on every dimension.
- Keep 7-Zip around as a fallback. The two coexist fine. NanaZip is the daily driver. 7-Zip is the “I need the obscure command-line option” escape hatch.
- Do not pay for WinRAR or WinZip. Both are still around, both still cost $30, both are worse than NanaZip on every dimension that matters. The free tier is good enough.
Bottom line
NanaZip is the upgrade 7-Zip users have been waiting for. The compression engine is the same. The format support is broader. The interface is modern. The Windows 11 integration is what Microsoft should have built into File Explorer. The trade-off is the smaller project. For most users, that trade-off is worth it. For me, it is. I switched six months ago. I am not going back.