Regex Tester
Test regular expressions with real-time match highlighting. Includes common regex presets.
How to use this tool
Select a pre-built expression pattern template or enter your custom regex.
Toggle flags like global (g) or case-insensitive (i) using control badges.
Paste test string source inside the uploader container and check matches highlights.
View group captures details table or copy snippet exporter code blocks.
Features
Real-time Highlighting
Instantly highlights matches as you type the expression and text.
Capture Groups Extraction
Lists all captured sub-groups for advanced query pattern debugging.
Replace Previews
Test matching replacements using standard string substitution panels.
Code Generator Snippets
Get drop-in regex code blocks for JavaScript, Python, Go, and PHP.
Frequently Asked Questions
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