Question 1

How does the Regex to JavaScript converter work?

Accepted Answer

Enter a regex pattern (with or without surrounding slashes), pick flags (g, i, m, s, u, y), and optionally type sample text to test live. The tool generates clean JavaScript snippets for .test(), .match(), .matchAll(), .replace(), .replaceAll() and .split(), plus named-group extraction.

Question 2

What regex flags are supported?

Accepted Answer

All standard JavaScript flags: g (global — find all matches), i (case-insensitive), m (multiline — ^ and $ match line boundaries), s (dotAll — . matches newlines), u (unicode), y (sticky). Toggle each flag with a checkbox.

Question 3

Should I use a RegExp literal or new RegExp()?

Accepted Answer

RegExp literals (/pattern/flags) are preferred for static patterns — they are parsed once at compile time. Use new RegExp(pattern, flags) when the pattern is built dynamically from a string or user input. This tool generates both forms so you can choose.

Question 4

Does this tool upload my regex or sample text?

Accepted Answer

No. All parsing, matching and code generation run entirely in your browser. Your regex and any sample data never leave your device.