regex101: PCRE (Legacy) Substitution Workspace

Regular Expression

([^"])((https?|s?ftp|ftps?|file)://.*?)([\s]|\&quot;\s)

New

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- This file was created with the aha Ansi HTML Adapter. http://ziz.delphigl.com/tool_aha.php -->
<html xmlns="http://www.w3.org/1999/xhtml">
    testssl.sh       2.7dev from https://testssl.sh/dev/
<span style="font-weight:bold;"> OCSP URI                     </span>http://clients1.google.com/ocsp
<span style="font-weight:bold;"> HTTP Status Code           </span>  302 Found, redirecting to &quot;https://www.google.nl/?gfe_rd=cr&amp;ei=ZWjmV86hE5LH8AeFmaP4Bg&quot;

Substitution

$1<a href="$2">$2</a>$4