There’s no upper limit to the size of document the Grammar Check Free can handle. We have tested it on a single page document; on a three, four sentence email and on a voluminous 500 page document and it passed the test with flying colors. So don’t worry about the size of the document that you submit for Grammar Check; it will do a meticulous job. However, if you have any doubts you can run checks chapter wise. Or if you think it’s not handling large documents properly, just contact us and let us know. Submitting a large document is not recommended. The reason for this is that it will be very tiresome to look at the suggested changes and to incorporate them. In doing this you might change the entire context of the document. Therefore it would be better that you submit the document chapter wise, study the results and make the changes that you want. Like this you will avoid getting confused and tired checking a large document. So it’s better to do it in small and manageable portions then trying to do it in one go.