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Regex Visualizer & Tester
Test your regular expressions against sample text and see matches highlighted in real-time. Perfect for debugging and learning regex patterns.
Test RegexVisualize MatchesDebug Patterns
g
How to use this tool
- Enter your regular expression pattern in the input field.
- Select flags (g for global, i for case-insensitive, etc.).
- Type or paste your test string in the text area.
- Click 'Test' to see all matches highlighted with groups and indices.
Examples
Email Pattern
Input
test@example.comOutput
Match 1: 'test@example.com' at index 0How to use Regex Visualizer
Open the tool, paste or upload your input, choose any options, and copy or download the output.
- Provide input (text, code, or a file) in the tool UI.
- Adjust settings (if available) to match your needs.
- Click the action button (or type) to generate the result.
- Copy or download the output.
How Regex Visualizer works
This tool runs entirely in your browser. It processes your input locally using client-side JavaScript and generates an output you can copy or download.
No accounts, no uploads, and no server-side processing are required.
Secure & Private
All processing happens securely. For local tools, your files and data never leave your device, ensuring maximum privacy and security.
Frequently Asked Questions
What regex flags are supported?
All standard JavaScript regex flags: g (global), i (case-insensitive), m (multiline), s (dotall), u (unicode), and y (sticky).
Can I test complex regex patterns?
Yes, the tool supports all JavaScript regex features including lookaheads, groups, and quantifiers.
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Privacy Notice
All processing happens inside your browser. No files or data are uploaded to our servers, ensuring your privacy is strongly protected.