• Reference & Education, Homeschooling
• IDR document file
• July 17, 2026

An IDR file is a file that uses the `.idr` file extension, such as `design.idr`, `project.idr`, or `drawing.idr`. The file extension is the part after the dot in a filename, and Windows uses it to determine what kind of file it may be and which program should open it. However, unlike common file types such as JPG, PNG, PDF, or …