texdiff – Compare documents and produce tagged merge

Two files are com­pared and a new TeX file is out­put. When the out­put file is pro­cessed with (La)TeX it marks new changes with blue and old text with red with a strike-through line. Fur­ther­more, pas­sages with changes are marked at the mar­gin with grey bars by the LaTeX change­bar pack­age.