Find URL in String

[Regex]::Matches($string, '((https?|ftp|file):\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-](.*?)(?=\s))').Value

Details

Match URL with optional protocol

Example

PS C:\> $string = 'You can find tons more PowerShell examples at https://www.dowst.dev/category/strings/regex/ with new stuff uploaded every day'
>> [Regex]::Matches($string, '((https?|ftp|file):\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-](.*?)(?=\s))').Value

https://www.dowst.dev/category/strings/regex/