Regex Tester
Test JavaScript regular expressions. Free, private, and local-first.
Use Regex Tester
Test JavaScript regular expressions against sample text locally.
0 matches
Enter a JavaScript regular expression and test text.
Quick answer
Regex Tester is a free online tool that helps you test JavaScript regular expressions. It runs in your browser, so you can work with development data, text, files, or generated output without creating an account.
About Regex Tester
Regex Tester helps you test JavaScript regular expressions. It is designed for focused local-first workflows where you need a quick result without creating an account or sending your input to a server.
Common uses include validating form input patterns, testing regex for data extraction, debugging complex regular expressions.
Use the examples, usage notes, FAQ, and related tools below when you need to compare formats, build sample data, validate inputs, or move into the next step of the same workflow.
What this tool does
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
Related workflow
After using Regex Tester, many workflows continue with related tools for validation, conversion, cleanup, mock data, or final export.
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.