How to open .JAR files on Windows
To open .JAR files on Windows, right-click the .jar file and choose open with..
Step-by-step instructions
- Right-click the .JAR file and choose Open with.
- Select a trusted Windows app that supports .JAR files.
Recommended software
- Built-in extractor
- 7-Zip
- WinRAR
Alternative methods
- Open .JAR in a browser-based viewer if desktop apps fail.
- Try opening .JAR on Windows with a secondary app to rule out app-specific issues.
- Convert .JAR only with trusted tools when direct opening is not possible.
Common issues
.JAR file does not open
This usually means the required app is missing or the .JAR file is incomplete.
- Install or update a compatible application.
- Verify the file came from a trusted source and was fully downloaded.
- Try opening the file in an alternative app on another platform.
Security note
Only open .JAR files from trusted senders.