Regex Tester
Test and debug regular expressions with real-time matching, highlighting, and replacement. Supports all JavaScript regex flags.
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What is the Regex Tester?
The Regex Tester is a powerful online tool designed to help developers test and debug regular expressions in real-time. It provides instant visual feedback with pattern matching, syntax highlighting, and text replacement capabilities, supporting all JavaScript regex flags. Whether you're validating email formats, extracting data, or building complex pattern matching logic, this tool streamlines your regex development workflow.
How Does the Regex Tester Work?
Simply enter your regular expression pattern in the dedicated field and paste the text you want to test against it. The tool instantly highlights all matches in your input text and displays results in real-time as you type or modify your pattern. You can also test replacements, toggle different JavaScript flags (global, case-insensitive, multiline, etc.), and refine your regex until it works exactly as intended.