Opening a COO File

The COO file type is primarily associated with CAD.

COO	File extension: COO
	File type:	data file

What is a COO file

COO files mostly belong to CAD. COO files store coordinate-based data that serve specialized functions.
They are used to record precise points in space.
This file can hold coordinates from surveying work for CAD applications or, alternatively, can list nonzero entries for sparse matrices.

Surveying and CAD: Often they contain measuring data from field surveys and are used in design software. For instance, products related to Topcon Tools use such files.

Sparse Matrix Storage: In some cases, the file stores a coordinate list that represents sparse matrices. This method is supported by libraries like GraphBLAS.

FilExt.com tip: The content and functionality depend on the context in which the file was created, so using the appropriate, specialized software is essential to properly open and view its data.

How to open COO files

You need a suitable software like CAD to open a COO file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your COO file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a COO file directly in the browser:. Just drag the file onto this browser window and drop it.

Online COO Text Viewer

Choose your .coo file to analyze

or drag and drop it here

Online File Viewer

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COO format details:

The file format determines how the data is stored in the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. If the file extension or signature does not match the file format, errors will occur when opening or editing the file. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below you will find our evaluation of the COO files:

As a file extension, COO isn't very common and includes very many different file formats. However, the following two file formats are common:

• 15% of all COO files use the same file format, which can be identified by the letters "02 08" at the beginning. They consist of unreadable binary data. The file size is in the range of 330 bytes to 43 KB.
• 5% of all COO files start with the magic bytes COO , which are always the first bytes of this file format. These files contain text and words, not binary data. The files are 4 KB to 70 MB in size, with a median of 70 MB. A usual file name is orkut_undir.coo or rMatGraph_J_5_100.coo. These files can be linked to graph, orkut and undir.

All the rest of the COO files (80%) have different formats. Tagged as coordonate, inventar, plan, puncte, stalp, coordinate, topografic, coord or drum. If you want to find out which format your COO file belongs to, just click on the button "Choose your .coo file to analyze".