What is a FUN file?
A .FUN file can be many different things. The most common use is as a serialized game save data file for games built with the Unity game engine or for Nintendo's Super Princess Peach. Another popular use is the Supreme Duelist Stickman Map, a custom level file created for the game by Neron's Brother.
Other software also uses the .FUN extension. It can be an encrypted video file for the 51cg Fun Player, an interactive quiz package in a .ZIP format from Funnel Web, or a 3D mechanical part file from Alibre Design. Be careful: the Jigsaw Ransomware is malicious software that locks your personal files and renames them with the .FUN extension.
How to open FUN files?
Because a .FUN file has multiple possible meanings, it is difficult to know which software to use. viewer.online/fun analyzes .FUN files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. This prevents you from running malicious software or breaking your save files.
Best practices and troubleshooting
If you receive an unknown .FUN file, do not double-click it. It could be an executable file from Fun Test or a ransomware payload. Always inspect the file first. If the file is a known media file, 3D model, or game package, you might want to convert it. We recommend file conversion to sensible target formats like .MP4, .ZIP, or .OBJ on convert.guru.
Software and tools
To manage these files locally, you need the specific software that created them. For example, you need the Unity editor or a compatible game client for Unity saves. You need the 51cg Fun Player for encrypted videos. If the file is an archive, tools like 7-Zip might extract the contents.
Summary
viewer.online/fun directly opens and previews .FUN files in the browser, eliminating the need to install software or troubleshoot compatibility issues.