What is an ACO file?
An .ACO file is primarily an Adobe Photoshop Color Swatch File. It stores custom color palettes for digital design projects. Designers use .ACO files to save, manage, and share exact color collections. The primary developer of this format is Adobe Systems.
However, an .ACO file can have other uses. It can be an ArchiCAD library object file for Graphisoft ArchiCAD or a 3D model format used by 3D-Coat. Because an .ACO file has multiple possible meanings, we recommend using viewer.online/aco to identify the actual format of your file.
How to open ACO files?
If your file is a color swatch, you can open it using Adobe Photoshop or Adobe XD. You can do this by using the "Import Swatches" option in the software. If your file is a 3D object, you will need to open it in Graphisoft ArchiCAD or 3D-Coat.
If you do not know what kind of .ACO file you have, viewer.online/aco can analyze .ACO files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
Handling an .ACO file can be confusing because it might contain a 2D color palette or a complex 3D object. viewer.online/aco is useful for identifying, inspecting, and understanding .ACO files without installing software or dealing with compatibility problems.