Regex Editor & Tester

This regular expression checks if a string or line starts with an http:// or https:// protocol prefix. It is case-insensitive, meaning it will also match variations like HTTP:// or Https://. Because it uses the global and multiline flags, it can scan an entire text document to find every line that begins with a standard web URL. It is commonly used for basic link extraction or validation before parsing the remainder of a URL.