File generated by Pro Tools, a professional audio recording, editing, and mixing application; saves waveform information that Pro Tools has calculated for audio files; enables Pro Tools to display a preview of the waveform in the software.

WFM files act as a cache so that Pro Tools doesn't have to recalculate the audio form information each time a session is opened. WFM files are stored with Pro Tools session files (.PTX or .PTF).

Data file created by Tektronix oscilloscopes and logic analyzers, which are used to test electronic circuits and signal voltages; saves the signal information as well as the display information on the device's display; used for creating time versus voltage graphs.

WFM files can be opened using WaveStar software and can be converted to other standard formats using the Tektronix Windows Oscilloscope WFM Converter. For example, WFM files are sometimes converted to .CSV or tab-delimited text files and then imported into a scientific analysis application such as MATLAB.