In implementations of systems for generating snap guides relative to glyphs of editable text rendered in a user interface using a font, a computing device implements a snap guide system to receive input data describing a position of a cursor relative to the glyphs of the editable text in the user interface. The glyphs of the editable text are enclosed within a bounding box having a height that is less than a height of an em-box of the font. The snap guide system generates a first group of snap guides for the glyphs of the editable text which includes a snap guide for each side of the bounding box and a snap guide for an x-height of the font. The snap guide system generates an indication of a particular snap guide of the first group of snap guides for display in the user interface based on the position of the cursor.