How to snap pivot to face in Blender? With Pivot Master.

Change your Mesh's Local Pivot to a Face, Vert, or Edge in just one click with this small Add-On! Also works with Multiple selected Faces or Vertices.

Easy install!

1. Download the "Master Pivot" Add-on that matches you Blender version.
2. Install the "Master Pivot" Add-on by clicking the "Install..." button under the Preferences -> Add-ons.
3. Browse to where you saved the downloaded Add-on file.
4. Select the Add-on version that matches your Blender version.
5. Check the tick box to assure the Add-on is loaded.
6. Assign Hotkey.
7. Celebrate.

The default Hotkey (Alt+1). You can change it to your liking.

You can also access the tool from the Mesh Menu when you are in Edit Mode. 

You must a component selected (Face, Vert, Edge) in order for the tool to work.