Regex for Text Cleaning: 15 Essential Patterns

5 min read

Regular expressions are the Swiss Army knife of text cleaning. Here are the 15 patterns every developer should know.

Essential Patterns

TaskRegex
Strip HTML tags<[^>]*>
Collapse whitespace\s+
Remove URLshttps?://\S+
Remove emails[\w.+-]+@[\w-]+\.[\w.-]+
Remove numbers\d+
Remove non-ASCII[^\x00-\x7F]
Remove punctuation[^\w\s]
Trim each line^\s+|\s+$ (multiline)
Remove blank lines^\s*$\n (multiline)
Remove duplicate spaces {2,}

Online Tool

Use our plain text converter — it applies these patterns with toggleable options, no regex knowledge needed.