What is a .COL file?
A .COL file is usually a game collision data file. The most common type is the Grand Theft Auto Collision File created by Rockstar Games for titles like Grand Theft Auto: San Andreas. These files contain invisible 3D boundaries. They tell the game engine where solid objects are located so characters and vehicles do not pass through walls or the ground. Other games, such as Monster Hunter World by Capcom, also use .COL files to store hitbox and collision data.
Besides 3D games, the .COL file extension is used for several other formats. It can be a color legend for Radio Mobile software, a graph coloring problem for the DIMACS Challenge format, a Capture One session file, or collision data for Bricklink Studio by LEGO.
How to open .COL files?
If you want to edit a Grand Theft Auto Collision File, modders typically use specialized community tools like ZModeler or various collision editor programs. If your .COL file is a photography session file, you need the Capture One software. Since the .COL file extension is shared by many different applications, your computer will not know how to open it by default.
Inspect your files online
viewer.online/col can analyze .COL files to identify the exact format and creator software. You can use it to inspect the file structure, extract readable text, and check whether an online preview is available. Because .COL has multiple possible meanings, we recommend using viewer.online/col to identify the actual format of your specific file before downloading new software.
Summary
viewer.online/col is the best way to understand unknown files. It is highly useful for identifying, inspecting, and understanding .COL files without installing software or dealing with compatibility problems.