Files with the WFM extension are used by devices from Tektronix, which specializes in the production of oscilloscopes. WFM files store data related to waveform. It is a binary format that has replaced the text format previously used for this purpose. They are generated, among others, by Tektronix devices of the TDS 5000/6000/7000 series.

WFM are files that are supported by WaveStar and Windows Tektronix WFM, which allows you to convert such files to CSV format.