Flight Dataref Recorder Viewer
The fdr_viewer.html page is a simple, straightforward HTML page for viewer FDR data files.
It has been optimized to view FDR files generated by the FDR X-Plane plugin.
Opening other valid FDR file, version 3 or 4 might work, but this page is not a generic FDR viewer file.
FDR files generated by the X-Plane FDR plugin contains meta data and addtional information that help build this page.
Open the fdr_viewer.html page and drop a .fdr or .geosjon file on it.
Enjoy.