Regex Tester
Test regular expressions against your text.
Processed on your device. Inputs are not uploaded.Runs locally in a background worker
How to use
Enter a JavaScript regular expression without enclosing slashes, set flags, and add test text.
Example
Use \b\d+\b with g to find whole numbers in a sentence.
Limitations
Patterns run in a worker with a timeout to stop catastrophic backtracking. JavaScript regex syntax applies.
Privacy
Your input stays in browser memory while you use this page. It is not uploaded or saved. Downloads are saved only when you choose to save them.