.exe · application/vnd.microsoft.portable-executable
What is a .exe file?
Windows Executable
About the format
An .exe is a Windows program in the Portable Executable (PE) format — the files start with the bytes MZ, a nod to Mark Zbikowski that has survived since MS-DOS. Double-clicking one runs it with your permissions, which makes provenance the only question that matters: who made this file, and do you trust them? Practical checks before running an unknown .exe: right-click → Properties → Digital Signatures (a valid signature from a named company is meaningful; no signature is a caution sign for commercial software), scan it (Defender does this automatically on write and execute), and check where it came from — an installer downloaded from the vendor's own site is a different proposition to an attachment or a 'codec pack'. Windows marks files downloaded from the internet with a zone identifier, which is why you see the SmartScreen prompt on first run. Renaming a file to .exe doesn't make it a program, and renaming an .exe to something else doesn't make it safe.
How to open a .exe file
Windows
- Windows itself (double-click runs it)
macOS
- not natively — Wine/CrossOver or a Windows VM
Linux
- Wine or a Windows VM
Is a .exe file dangerous?
Yes — by definition it's code that runs on your machine. Trust is entirely about the source and the signature.
Related file types
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