Create, edit, and test RegEx Regular Expressions. Replace, format, and extract text in files using Regular Expressions. Perform GREP-like tasks, use RegEx substitutions, extract data! Supports color syntax highlighting and contextual tooltips making it easy to design patterns. Specialized RegEx tools like html/xml tag selector, line selector, or number selector help you make RegEx patterns faster. Integrated RegEx Builder helps with testing your RegEx patterns.