Regex Tester
Test JavaScript regular expressions. Free, private, and local-first.
Tool facts
- Upload required
- No
- Signup required
- No
- Category
- Developer Tools
Use Regex Tester
Test JavaScript regular expressions against sample text locally.
Summary
0 matches
Enter a JavaScript regular expression and test text.
What this tool does
Real-time regex matching with highlights
Show capture groups and match details
Support for global, multiline, and case-insensitive flags
Test against multiple sample strings
How to use Regex Tester
- 1
Enter your regular expression pattern.
- 2
Add test flags (g, i, m) as needed.
- 3
Paste sample text to test against.
- 4
Review highlighted matches and capture groups.
Examples
Email pattern
[\w.]+@[\w.]+
URL pattern
https?://[\w./-]+
Use cases
- Validating form input patterns
- Testing regex for data extraction
- Debugging complex regular expressions
- Learning regex with instant feedback
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.