About the Regex Tester
The Regex Tester is a quick way to try out and debug your regular expressions (regex). Regular expressions are powerful for searching, matching, and replacing patterns in text — this tool helps you build and refine them without guesswork.
Why use a Regex Tester?
- Instantly test regex patterns against sample text
- Highlight matches for better visibility
- Debug and refine complex regex syntax
- Learn regex through trial and error
How to use the tool
- Enter your regular expression in the regex field.
- Paste or type sample text into the test field.
- Click Test to instantly highlight matching results.
- Adjust your regex until it works as intended.
Example: The regex \\d+ will match numbers like 123 in the text.