MScontrol a professional Mid/Side controller utility plug-in is available now for FREE. MScontrol offers stereo signal encoding into mid-side signal, decoding of mid-side signal into stereo signal, as well as an "onboard" mode to adjust the signal without the need of using two plugin instances.
Take the control of your gain, panoramic, flip the phase, and mute the mid or side signals separately. Widen your sound, move it the way you want in the stereo space or enhance the mono compatibility. Monitor the L/R and M/S levels with the dBFS peak meters to keep your signal under control.
MScontrol is available to download for free as a VST2/VST3/AU plug-in for macOS and Windows.