JavaScript Regex Tester
Test and debug JavaScript regular expressions instantly – perfect for developers, testers, and learners.
RegExp:
//gMatches (0)
Enter a pattern and textNo matches
What is the JavaScript Regex Tester?
The JavaScript Regex Tester allows you to build, test, and validate regular expressions in real time.
It’s useful for developers debugging regex patterns, QA engineers writing test cases, and learners practicing regex syntax.
How to Use the Regex Tester
Follow these simple steps:
Step 1:Enter your regex pattern:
Type or paste your regular expression (e.g., `/^[a-z0-9]+$/i`).
Step 2:Add sample text:
Enter the text you want to test against your regex pattern.
Step 3:Test & match:
The tool will instantly highlight matches and show captured groups.
Step 4:Copy or refine:
Copy the working regex for use in your JavaScript code or adjust it as needed.
Common Uses
Why you might use this tool:
- Form ValidationTest regex for validating emails, phone numbers, or custom input fields.
- Search & ReplaceBuild regex to find and replace text patterns efficiently.
- Learning RegexPractice and understand regex syntax with instant visual feedback.
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