Regex Replace is a free Chrome add-on developed by code for charity. It falls under the Browsers category and specifically the Add-ons & Tools subcategory. This powerful tool allows users to replace text on any website using regular expressions.

With Regex Replace, users have the ability to replace text, HTML, pictures, CSS, and JS scripts anywhere on a webpage. The add-on offers multiple options for applying replacements, including by domain, URL, keyword, or regular expression. Users can also make bulk edits using a text file containing regular expressions.

One notable feature of Regex Replace is the ability to apply regular expressions conditionally, only if other regex patterns match the page content. This allows for more complex replacements based on specific conditions. The add-on also supports regex flags and provides the option to activate or deactivate applied regex.

Please note that Regex Replace is currently in a testing version, with more options to come in the future. Despite this, the add-on has already gained popularity, with over 250,000 users benefiting from code for charity's distraction-free extensions since 2012.

Overall, Regex Replace is a valuable tool for anyone needing to replace text or code on websites. Its flexibility and extensive options make it a must-have for web developers, designers, and users who want to customize their browsing experience.