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UUID Generator
Generate unique identifier codes
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🔍Regex Tester
Test and validate regular expressions
Input
Provide text, data, or settings for this tool.
Output
Processed result appears here.
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What is a Regex Tester?
A regex tester is a tool that helps you test and validate regular expressions (regex) against sample text. It highlights matches, shows groups, and helps debug regex patterns used in programming, data validation, and text processing.
Why Use Our Regex Tester?
Test regex patterns in real-time
Highlight matches in text
Show capture groups
Support for all regex flags
Perfect for debugging patterns
Free unlimited testing
No installation required
Frequently Asked Questions
Flags modify regex behavior: g (global — find all matches), i (case-insensitive), m (multiline — ^ and $ match line boundaries), s (dotall — dot matches newlines).
Capture groups (parentheses) extract specific parts of a match. Example: (\d+) captures digits. Named groups use (?<name>...) syntax.
Enable the m flag to make ^ and $ match start/end of each line. Enable s to make . match newline characters too.
Currently, patterns are not saved between sessions. Copy and store patterns you want to reuse in a text editor or document.