diff --git a/static/glob2regex.html b/static/glob2regex.html
new file mode 100644
index 0000000..04a3538
--- /dev/null
+++ b/static/glob2regex.html
@@ -0,0 +1,45 @@
+﻿<!DOCTYPE html>
+
+<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
+<head>
+    <meta charset="utf-8" />
+    <title>Glob to Regex</title>
+    <script src="https://code.jquery.com/jquery-2.2.4.js" integrity="sha384-TlQc6091kl7Au04dPgLW7WK3iey+qO8dAi/LdwxaGBbszLxnizZ4xjPyNrEf+aQt" crossorigin="anonymous"></script>
+    <script>
+        "use strict";
+
+        var need_escaping = [".", "$", "^", "{", "[", "(", "|", ")", "*", "+", "?", "\\"];
+        //according to https://msdn.microsoft.com/en-us/library/4edbef7e%28v=vs.110%29.aspx
+        function glob2regex(glob) {
+            var out = "";
+            for (var i = 0; i < glob.length; i++) {
+                var c = glob[i];
+                if (c == "*") {
+                    if (glob[i + 1] == "*") {
+                        out = out + ".*"
+                        i++;
+                    } else {
+                        out = out + "[^/]*";
+                    }
+                } else if (c == "?") {
+                    out = out + "[^/]";
+                } else if (need_escaping.includes(c)) {
+                    out = out + "\\" + c;
+                } else {
+                    out = out + c;
+                }
+            }
+            return out;
+        }
+    </script>
+</head>
+<body>
+    <label>Path with wildcards <input type="text" id="glob" /></label>
+    <br />
+    Supported wildcards: <code>?</code> (single character except "/"), <code>*</code> (any count of characters except "/"), <code>**</code> (any count of characters)
+    <br />
+    <button type="button" onclick="$('#regex').val(glob2regex($('#glob').val()));">Covert</button>
+    <br />
+    <label>As C# regular expression <input type="text" id="regex" /></label>
+</body>
+</html>
diff --git a/static/index.html b/static/index.html
index 8aaec93..36ec222 100644
--- a/static/index.html
+++ b/static/index.html
@@ -61,6 +61,8 @@
                 </li>
                 <li>
                     <label>Filter Regular Expression<br /><input type="text" id="github_filter_regexp" required="required" size="40" /></label> Case-sensitive C#
+                    <br />
+                    <a href="glob2regex.html" target="_blank">Regular Expression Helper</a>
                 </li>
                 <li>
                     <button type="button" onclick="proceed_github()">Proceed</button>
