1. One or more non-transitory computer-readable media having instructions stored thereon which, when executed by a processor of a computing device, provide the computing device with a redaction module to: receive a request to redact a selection of a group of text from a document, wherein the group of text comprises one or more words; identify instances of the group of text occurring within the document, including for each instance of the group of text, word coordinate information of the one or more words of the instance, wherein the word coordinate information of the one or more words of the instance includes (x, y) coordinates of the one or more words; and generate redaction information for a redaction mask, including redaction coordinates, for each instance of the group of text, wherein the redaction coordinates of each redaction mask include (x, y) coordinates of the redaction mask, wherein generation of the (x, y) coordinates of a redaction mask is based at least in part on the (x, y) coordinates of the one or more words of the instance of the group of text to be redacted, wherein application of the redaction masks in accordance with the redaction coordinates of the redaction masks redacts the respective instances of the group of text, wherein a y-height of the mask is substantially equal to a height of a tallest letter within the respective instances of the group of text, wherein the height of the tallest letter is greater than heights of at least some of other letters within the respective instances of the group of text.