What is this tool?
Regular expressions describe text patterns. They are commonly used for searching, validation, parsing, and text replacement.
How to use it
Try \d+ against text containing numbers to list each numeric match.
Privacy
This tool is designed to process your input locally in the browser. Avoid entering passwords, private keys, or other sensitive production data into any online tool.
Frequently asked questions
Which regex flavor is used?
This tool uses the JavaScript regular expression engine provided by your browser.
What are regex flags?
Flags change matching behavior, such as case-insensitive matching with i or multiline matching with m.