.FR3 File Extension

Page layout file created by FastReport Studio, a report designing tool; saves the report structure as well as fillable forms, text, and images; can be saved in a compressed or uncompressed format; can be embedded into an application that prints FastReport forms.

When an application generates a report using an FR3 file, it calls the resulting report a "prepared report." Prepared reports use the .FP3 extension and can be viewed with the FastReport Viewer application.