CUO file format description

Many people often share .cuo files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .cuo files. To address this issue, we have created this page to offer assistance and guidance on handling .cuo files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .cuo files.

Our aim is to simplify the process and promote seamless use of the .cuo file format.

1 filename extension(s) found in our database.

.cuo - CUDA Object

The CUO development files are related to Nvidia CUDA Toolkit. The CUO file is a CUDA Object. CUDA is a parallel computing platform and programming model created by NVIDIA and implemented by the graphics processing units (GPUs) that they produce.

Nvidia CUDA Toolkit
Development files
- / -
CUDA Object related extensions:
Mac OS X Crash Log
WinBatch Menu Data
STEP 7 Program
ReaGeniX Consistency Check Data
Visual FoxPro Class Library Memo
AutoIt v3 Script

Naturally, other applications may also use the .cuo file extension. Even harmful programs can create .cuo files. Be especially cautious with .cuo files coming from an unknown source!

Can't open a .cuo file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cuo file extension is often given incorrectly!

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. By providing this list, we aim to assist users in finding the correct information more easily and improving their overall search experience on our site.

These misspellings were the most common in the past year:

cho, cio, cko, co, cu, cui, cul, cup, cyo, duo, suo

Is it possible that the filename extension is misspelled?

There is a possibility that the .cuo filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .cuo:

my Knowledge Explorer Change Unit
ChessBase Key Openings
Atari ST DUO Image
Cubloc Studio PLC Information
CU-SeeMe Data
Kokogut C Output File

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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