What this tool does

Test regular expressions against input, toggle flags, and view matches or replacements. Supports multiline, global, and ignore-case options.

Steps

1. Select Match mode or Replace mode.
2. Enter your Regular expression (and flags if needed).
3. Provide the Input string and optional Replacement.
4. Review the Output; use ↥ to send output back to input.

Examples

Regex: (\w+)@(\w+\.\w+)
Input:  contact: support@example.com
Match groups → ["support", "example.com"]

Notes

• Escaping differs across languages; this tool uses JS regex.
• Large inputs may be slow; simplify patterns if needed.