diff --git a/snippets/isAbsoluteURL.md b/snippets/isAbsoluteURL.md
new file mode 100644
index 000000000..8f13f5861
--- /dev/null
+++ b/snippets/isAbsoluteURL.md
@@ -0,0 +1,15 @@
+### isAbsoluteURL
+
+Returns `true` if the given string is an absolute URL, `false` otherwise.
+
+Use a regular expression to test if the string is an absolute URL.
+
+```js
+const isAbsoluteURL = str =>  /^[a-z][a-z0-9+.-]*:/.test(str);
+```
+
+```js
+isAbsoluteURL('https://google.com'); // true
+isAbsoluteURL('ftp://www.myserver.net'); // true
+isAbsoluteURL('/foo/bar'); // false
+```
diff --git a/tag_database b/tag_database
index e2bb75c7e..716ff171b 100644
--- a/tag_database
+++ b/tag_database
@@ -64,6 +64,7 @@ initializeArrayWithRange:array
 initializeArrayWithValues:array
 inRange:math
 intersection:array
+isAbsoluteURL:string
 isArmstrongNumber:math
 isArray:utility
 isBoolean:utility