Find the right pattern.
Test a JavaScript regular expression and inspect its matches.
Choose a quantity and generate UUID v4 identifiers in one click.
Each match includes its position and groups. Expensive patterns are stopped automatically.
Test a JavaScript regular expression
Enter a pattern without surrounding / delimiters in the Expression field, and flags such as g, i or m in Flags. Paste the text to search. The result lists matches and their positions, along with captured and named groups. Processing is isolated so an expensive expression can be stopped.
Which regular expression syntax is used?
Your browser’s JavaScript regex engine. PCRE patterns and expressions from other languages may need adjustments.
Why was my expression stopped?
Some patterns can take an excessive time to match. Devkit stops processing after three seconds and limits output to one thousand matches.