AAT file - How do I open a .aat file?
The table below provides useful information about the .aat file extension. It answers questions such as:
- What is the .aat file?
- What program do I need to open a .aat file?
- How can the .aat file be opened, edited or printed?
- How can I convert .aat files to another format?
Table of Contents
- ✅ ArchiCAD Attributes Data
- ✅ ArcInfo Line Data
- 🔄 .aat file converters
- 🚫 .aat file related errors
We hope you find this page helpful and a valuable resource!
2 extension(s) and 0 alias(es) found in database
✅ ArchiCAD Attributes Data

The AAT file is an ArchiCAD Attributes Data. ArchiCAD is an architectural CAD-software developed by the Hungarian company Graphisoft.
✅ ArcInfo Line Data

The AAT file is an ArcInfo Line Data. ArcInfo is a complete and extensible geographic information system.
Other types of files may also use the .aat file extension.
🚫 The .aat file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .aat 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 cannot open this file:
example.aat
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .aat file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .aat file extension, write to us!