Techniques are described for systems and computer-implemented methods that may be used to replace missing glyphs. The methods may include identifying a source font associated with each respective missing glyph in a document and extracting features pertaining to the source font for each respective missing glyph. The method may further include identifying a number of target fonts for each respective missing glyph based at least in part on the features extracted from the source font. The method may also include ranking the target fonts based on a respective target font having a similarity to one or more of the features. The method may include triggering for display in a user interface within the document and for each missing glyph, a subset of the ranked target fonts that are ranked highest and which include a character configured to replace each respective missing glyph in the document with a new glyph.