Free web-based utility that compares and reports differences in plain text pasted into it. Novel text diff algorithm that detects when a paragraph or line has been moved up or down in a document. Users have a choice between comparing whole lines against each other or switching to fine-grained word and character comparisons. There is an option to omit identical paragraphs or lines in its output unless they are near differences. Ability to navigate from one difference to the next. Also can move from one group of adjacent differences to the next group.