A regular expression (regex or regexp) is a sequence of characters that specifies a search pattern in text. This tool helps you test and debug your regex patterns against a sample text string.

• Enter Pattern: Type your regex pattern in the "Regular Expression Pattern" field. Do not include the leading/trailing slashes unless they are part of your pattern. Flags are handled by checkboxes.
• Set Flags: Choose common flags like Global (g), Case Insensitive (i), and Multiline (m).
• Provide Test String: Input the text you want to test your regex against in the "Test String" area.
• Test: Click "Test Regex" to see the results.
• View Matches: Matched parts of your test string will be highlighted. The total number of matches found will also be displayed.
• Error Handling: If your regex pattern is invalid, an error message will appear.

This tool is great for developers, data analysts, or anyone working with text patterns to quickly validate their expressions.