1. A computer-implemented method for font subsetting, wherein a computer is programmed to perform steps of the method and said method comprises: analyzing, by a processor, for each of all multiple text fonts represented in a document, characters of a font set of the text of the document character by character and by character combinations to identify interdependence between the characters and determine the characters associated with glyphs having different forms at different locations of a character in a word or the font set where one or more ligatures represent a combination of characters, wherein analyzing includes determining if characters of one of the multiple text fonts include variants of a glyph and if characters of one of the multiple text fonts include a combination of characters that represent a single ligature; creating a font subset containing shapes of the glyphs corresponding to only character forms present in the document identified in the analyzing of the text of the document thereby providing a font subset of a reduced size, wherein the font subset includes a ligature or a glyph that has different forms at different locations of a character in a word; and associating the font subset with the document, wherein said associating the font subset with the document comprises embedding the font subset in the document or transmitting the font subset along with the document.