diff --git a/documentation/_run/index.php b/documentation/_run/index.php
index 24c9ceab..139141c0 100644
--- a/documentation/_run/index.php
+++ b/documentation/_run/index.php
@@ -16,6 +16,8 @@
 	<link href="<?php echo $distribute; ?>/nouislider.css?v=<?php echo $plain_version; ?>" rel="stylesheet">
 	<script src="<?php echo $distribute; ?>/nouislider.js?v=<?php echo $plain_version; ?>"></script>
 
+	<link rel="canonical" href="<?php echo $canonical; ?>">
+
 </head>
 
 <body class="language-javascript">
diff --git a/documentation/_run/router.php b/documentation/_run/router.php
index 9e8f228b..d86cb0aa 100644
--- a/documentation/_run/router.php
+++ b/documentation/_run/router.php
@@ -25,9 +25,10 @@
 		$file = '_run/404.php';
 	}
 
-	// Defaults for title and description.
+	// Defaults
 	$title = "";
 	$description = "";
+    $canonical = "";
 
 	$package = json_decode(file_get_contents('./../package.json'));
 	$version = $package->version;
@@ -40,5 +41,9 @@
 
 	ob_end_clean();
 
+	if ($canonical) {
+        $canonical = 'https://refreshless.com'.$canonical;
+    }
+
 	$distribute = '/nouislider/distribute';
 	include '_run/index.php';
diff --git a/documentation/behaviour-option.php b/documentation/behaviour-option.php
index 92c398b8..31c6676b 100644
--- a/documentation/behaviour-option.php
+++ b/documentation/behaviour-option.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - User Interaction Settings";
 	$description = "noUiSlider supports a ton of features, such as dragging the range, or setting fixed handle distances.";
+	$canonical = "/nouislider/behaviour-option/";
 ?>
 
 <h1>Slider behaviour</h1>
diff --git a/documentation/contact.php b/documentation/contact.php
index 23b33468..41a63543 100644
--- a/documentation/contact.php
+++ b/documentation/contact.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Help and Contact";
 	$description = "";
+	$canonical = "/nouislider/contact/"
 ?>
 
 <h1>Contact</h1>
diff --git a/documentation/download.php b/documentation/download.php
index b8f921d6..f941abdf 100644
--- a/documentation/download.php
+++ b/documentation/download.php
@@ -1,6 +1,7 @@
 <?php
 $title = "noUiSlider - Download noUiSlider for free!";
 $description = "Download the latest version of noUiSlider safely from gitHub. For free!";
+$canonical = "/nouislider/download/"
 ?>
 
 <h1>Download noUiSlider</h1>
diff --git a/documentation/events-callbacks.php b/documentation/events-callbacks.php
index 5cb6ea0a..364be288 100644
--- a/documentation/events-callbacks.php
+++ b/documentation/events-callbacks.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Events and callbacks";
 	$description = "Listen to everything that happens, and run your code when you want too. noUiSlider has a bunch of events and callbacks. Read all about them!";
+    $canonical = "/nouislider/events-callbacks/"
 ?>
 
 <h1>Events</h1>
diff --git a/documentation/examples.php b/documentation/examples.php
index afd8047f..26eb0580 100644
--- a/documentation/examples.php
+++ b/documentation/examples.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Examples and hints";
 	$description = "noUiSlider has a selection of examples you can use to implement a slider easily. Take a look!";
+    $canonical = "/nouislider/examples/"
 ?>
 
 <section>
diff --git a/documentation/index.php b/documentation/index.php
index ebcbcca6..d72b3084 100644
--- a/documentation/index.php
+++ b/documentation/index.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - JavaScript Range Slider";
 	$description = "noUiSlider is a free and lightweight JavaScript range slider with multi-touch support (iOS, Android, Windows). Great for responsive designs, and no dependencies!";
+    $canonical = "/nouislider/"
 ?>
 
 <section>
diff --git a/documentation/more.php b/documentation/more.php
index 26b45b3a..f10aed55 100644
--- a/documentation/more.php
+++ b/documentation/more.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Disabling, Updating and Styling";
 	$description = "In-dept details on disabling slider handles, updating options and styling noUiSlider.";
+    $canonical = "/nouislider/more/"
 ?>
 
 <section>
diff --git a/documentation/pips.php b/documentation/pips.php
index 913e25af..575ee52b 100644
--- a/documentation/pips.php
+++ b/documentation/pips.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Handles and Slider Values";
 	$description = "";
+    $canonical = "/nouislider/pips/"
 ?>
 
 <h1>Adding a scale/pips to a slider</h1>
diff --git a/documentation/reference.php b/documentation/reference.php
index 6310223d..5493d23a 100644
--- a/documentation/reference.php
+++ b/documentation/reference.php
@@ -1,6 +1,7 @@
 <?php
 $title = "noUiSlider - Option Reference";
 $description = "Full reference of all options, methods, properties and events in noUiSlider.";
+$canonical = "/nouislider/reference/"
 ?>
 
 <section>
diff --git a/documentation/slider-options.php b/documentation/slider-options.php
index aa290a51..e477d86a 100644
--- a/documentation/slider-options.php
+++ b/documentation/slider-options.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Options and settings";
 	$description = "There are many options to make noUiSlider do exactly what you need. Read all about these options and find the one you need.";
+    $canonical = "/nouislider/slider-options/"
 ?>
 
 <h1>Options</h1>
diff --git a/documentation/slider-read-write.php b/documentation/slider-read-write.php
index 78cae219..7d16bbcb 100644
--- a/documentation/slider-read-write.php
+++ b/documentation/slider-read-write.php
@@ -1,9 +1,7 @@
 <?php
 	$title = "noUiSlider - Getting and setting slider values";
 	$description = "Reading and setting values from a slider is as easy as reading from any other form element.";
-
-	$title = "noUiSlider - Formatting numbers";
-	$description = "noUiSlider can read and display values formatting using a bunch of options. Read more here.";
+    $canonical = "/nouislider/slider-read-write/"
 ?>
 
 <h1>Getting and setting slider values</h1>
diff --git a/documentation/slider-values.php b/documentation/slider-values.php
index 8c33e530..83651567 100644
--- a/documentation/slider-values.php
+++ b/documentation/slider-values.php
@@ -1,6 +1,7 @@
 <?php
 	$title = "noUiSlider - Handles and Slider Values";
 	$description = "";
+    $canonical = "/nouislider/slider-values/"
 ?>
 
 <h1>Slider values</h1>
