Regex Tester
Test a JavaScript regular expression against a sample and see each match.
Tool
Output
Output appears here.Your data stays in this browser and is not uploaded.
How it works
- 1
Enter a pattern and optional flags.
- 2
Paste a short sample.
- 3
Read the matches and their positions.
Related tools
Questions
Can a pattern freeze the page?
Samples are limited to 2000 characters and patterns to 200, which reduces the worst backtracking. It is still JavaScript regex.