What is a ROI file?
A .ROI file typically contains Region of Interest data. Medical imaging software like OsiriX and scientific image analysis tools like ImageJ use this format to store specific coordinate boundaries within an image. A .ROI file can also be a Report Object Instance File created by Actuate reporting software. It is also used as a report output file from Infor SunSystems or Ross Systems.
How to open ROI files?
You need the exact software that created the file to open it correctly. For medical and scientific images, you can use ImageJ or the OsiriX DICOM viewer. For business report files, you need enterprise software like Crystal Reports. Some .ROI files are plain text or JSON files. You can inspect these with standard command-line tools or text editors. Because .ROI files have many different formats, it is often hard to know which software to use.
Inspect and identify your file
viewer.online/roi can analyze .ROI 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
viewer.online/roi is useful for identifying, inspecting, and understanding .ROI files without installing software or dealing with compatibility problems.