How it works
Fill in Pattern with your expression, Flags (g all matches, i ignore case, m multiline, s dotAll, etc.), and Subject with the text to search. Test runs matchAll-like behaviour and lists each match with its index—handy before you paste the regex into code.
Related tools
Slug generatorNormalize Unicode, drop diacritics, and replace spaces with single hyphens—ready for blog posts, IDs, or APIs.JSON formatterPretty-print minified JSON and validate in one click; invalid input surfaces a clear parser message so you can fix commas, brackets, or quotes.URL encode / decodePercent-encode or decode strings the way browsers do for URL components—ideal for query values, fragments, and path segments.XML formatterIndent nested tags for readability and catch mismatched tags or invalid markup before you ship configs or feeds.