What ?

Plain Geometry Editor is a QGIS plugin to edit geometry of features using WKT (well-known text) or WKB (well-know binary.

Demo on youtube

How ?

1. Select the layer you want to edit, and turn editing on.
2. Click then on the to identify a feature.
3. If a feature is found, a dialog opens in which you can edit the geometry in WKT or WKB.

Changes can only be applied if the new geometry is valid!