How to open a .zip file
ZIP archive · Compressed archive
Every version of Windows and macOS opens .zip files natively. Double-click it. If that fails, the archive is either corrupt, password-protected, or larger than the old 4 GB format limit.
What a .zip file actually is
ZIP is the universal compressed archive. Phil Katz published it in 1989 and put the specification in the public domain, which is exactly why it ended up everywhere: any operating system can implement it without paying anyone.
Because support is built in on both Windows and macOS, a .zip that will not open is almost never a missing-software problem. It is a problem with the file itself, which changes what you should do about it.
Why it will not open
If double-clicking does nothing, the usual causes are a truncated download, an archive encrypted with AES that the built-in tools cannot read, or a ZIP64 archive that some older utilities refuse. Windows and macOS both handle standard ZIP silently, so failure is a signal about the file, not about your computer.
Step by step
Windows
- 01Double-click the file. File Explorer shows the contents immediately.
- 02Important: browsing a ZIP in Explorer is not extracting it. Programs run from inside that preview often fail with confusing errors.
- 03Right-click the file and choose "Extract All…", pick a destination, then work with the real files.
- 04If Explorer reports the archive is invalid, open it with 7-Zip, which reads variants Windows rejects and will tell you plainly if the data is damaged.
macOS
- 01Double-click the file. Archive Utility extracts it into the same folder automatically.
- 02If you get "Unable to expand… (Error 79)" or similar, the archive uses AES encryption or a feature Archive Utility does not support.
- 03Install Keka or The Unarchiver and open it with that instead.
What usually goes wrong
Running programs from inside the preview
Windows lets you double-click an .exe while still browsing the ZIP. The file is silently copied to a temporary folder, so anything it expects to find next to it is missing. Always extract first, then run. Most "the ZIP is broken" reports are actually this.
A partial download looks identical
A ZIP that stopped downloading at 90% is still a .zip file with a normal icon. If extraction fails at the same point every time, download it again before blaming the software.
Programs that open .zip
Our pick, in order. Every one links to the publisher's official download URL and the SHA-256 hash of the installer, so you can check the file before you run it.
- 7-ZipA file archiver with a high compression ratio.v26.02 · 6 hashed installers95
- NanaZipThe 7-Zip derivative intended for the modern Windows experience.v6.5.1767.0 · 2 hashed installers100
- PeaZipA free file archiver utility and rar extractor for Windows and Linux, work with 200+ archive types and variants, handle spanned archives and support multiple archive encryption standards.v11.2.0 · 4 hashed installers95
- BandizipBandizip is a powerful archiver that provides an ultrafast processing speed and convenient features.v7.45 · 3 hashed installers100
Also registers .zip in its manifest
Taken straight from publisher manifests. Some of these handle the format for a narrow purpose rather than as their main job.
Common questions
- Why will my ZIP file not open on Windows?
- Windows opens standard ZIP archives natively, so a failure normally means the download was truncated, the archive uses AES encryption that Explorer cannot read, or the file is not really a ZIP despite the extension. Opening it with 7-Zip will report which of those it is.
- Do I need software to open a ZIP file?
- No. Windows, macOS, iOS and Android all handle ZIP without anything installed. You only need a separate tool for encrypted archives, damaged archives, or formats like RAR and 7z.
- How do I open a password-protected ZIP file?
- You need the password from whoever created it. Windows Explorer cannot open AES-encrypted ZIPs at all, so use 7-Zip and enter the password when prompted. Without the password the contents are not recoverable.