Text Rewriter is a free Chrome add-on developed by pelmers that allows users to replace specified phrases on a webpage. This add-on offers arbitrary substitution of any visible text on a page, giving users the ability to rewrite customizable patterns. Inspired by XKCD #1288 and "butt to butt," Text Rewriter provides a default replacement of "mispell" to "misspell."

With support for any JavaScript regular expressions, including backrefs and captures, Text Rewriter visits the visible text nodes on the page and replaces each provided pattern using nodeValue.replace. It's worth noting that if there is an overlapping pair of patterns, such as A -> B and B -> C, both A and B will be replaced with C.

Text Rewriter also includes a convenient taskbar icon that allows users to disable the add-on for specific domains. This feature is particularly useful if you have been a bit overzealous with substitutions and want to avoid any potential misunderstandings on platforms like Slack.

Additionally, Text Rewriter offers an experimental live update feature. This feature performs replacements on any text that appears on the page, even after it has loaded. This means that captions on platforms like YouTube can be updated in real-time with the specified replacements.

Overall, Text Rewriter is a versatile and fun Chrome add-on that allows users to customize and replace text on webpages. Whether for personal amusement or specific needs, this add-on provides an easy and accessible way to modify visible text on the fly.