Build and debug regular expressions right in your browser. Enter a regex pattern, choose your flags, and paste or type sample text to instantly see every match, captured group, and the total number of hits. Perfect for developers who want to test patterns before committing them to code.
Yes, all standard JavaScript flags are available: g, i, m, s, u, y. The tool passes them directly to the RegExp constructor, so if your browser supports u, it will work.
Each match and group is displayed as plain text; you can select and copy it manually. There is no dedicated export, but the information is fully visible.
No hard limit, but extremely large inputs (several MB) may slow down the UI because all processing happens in the browser’s main thread. For typical dev‑testing scenarios performance is excellent.