diff --git a/README.md b/README.md
index 6bd7449..e5a058f 100644
--- a/README.md
+++ b/README.md
@@ -26,10 +26,13 @@ const options = { prefix: '?' };
 qs.stringify(params, options);
 // '?food=pizza&bar=chocolate'
 
-
 // Parse query strings into objects
 qs.parse('?food=pizza&bar=chocolate');
 // { food: pizza, bar: chocolate }
+
+// Extract query string from url
+qs.extract('http://test.com?food=pizza&bar=chocolate');
+// food=pizza&bar=chocolate
 ```
 
 ## Tests
diff --git a/docs/QueryString.html b/docs/QueryString.html
index 21d3422..1a52406 100644
--- a/docs/QueryString.html
+++ b/docs/QueryString.html
@@ -32,7 +32,7 @@ <h1><a href="index.html" class="link">QueryString</a></h1>
         <ul></ul>
     </div>
     
-    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
+    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#extract">extract</a></li><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
 </nav>
 <div id="resizer"></div>
 
@@ -167,6 +167,166 @@ <h3 class="subsection-title">Methods</h3>
         <dl>
                 
 
+<dt>
+    
+        <h4 class="name" id="extract">
+            
+                <span class="type-signature"></span>extract<span class="signature">(url)</span><span class="type-signature"> &rarr; {string}</span>
+                
+            
+            <div class="container-source members">
+                <code><a href="index.js.html">index.js</a></code>,
+                <code><a href="index.js.html#line102">line 102</a></code>
+            </div>
+            
+        </h4>
+
+        
+    
+</dt>
+<dd>
+
+    
+    <div class="description">
+        Extract the query string sentence from any url. If there is no query string, empty string should be returned.
+    </div>
+    
+
+    
+
+    
+
+    
+
+    
+    <div class="container-params">
+        <h5>Parameters:</h5>
+        
+<table class="params">
+    <thead>
+    <tr>
+        
+        <th>Name</th>
+        
+
+        <th>Type</th>
+
+        
+
+        
+
+        <th class="last">Description</th>
+    </tr>
+    </thead>
+
+    <tbody>
+    
+
+        <tr>
+            
+                <td class="name"><code>url</code></td>
+            
+
+            <td class="type">
+            
+                
+<span class="param-type">string</span>
+
+
+            
+            </td>
+
+            
+
+            
+
+            <td class="description last">url which contains</td>
+        </tr>
+
+    
+    </tbody>
+</table>
+
+    </div>
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+    <div class="container-returns">
+        <h5>Returns:</h5>
+        
+                
+
+
+
+<span class="param-type">string</span>
+
+
+
+
+
+- Extracted query string from url
+
+
+
+
+            
+    </div>
+    
+
+    
+
+
+<dl class="details">
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+</dl>
+
+
+    
+
+</dd>
+
+            
+                
+
 <dt>
     
         <h4 class="name" id="parse">
diff --git a/docs/index.html b/docs/index.html
index fb9e46f..f955577 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -32,7 +32,7 @@ <h1><a href="index.html" class="link">QueryString</a></h1>
         <ul></ul>
     </div>
     
-    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
+    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#extract">extract</a></li><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
 </nav>
 <div id="resizer"></div>
 
@@ -74,10 +74,13 @@ <h2>Install</h2><pre class="prettyprint source lang-bash"><code>$ npm install qu
 qs.stringify(params, options);
 // '?food=pizza&bar=chocolate'
 
-
 // Parse query strings into objects
 qs.parse('?food=pizza&bar=chocolate');
-// { food: pizza, bar: chocolate }</code></pre><h2>Tests</h2><pre class="prettyprint source"><code>$ npm test</code></pre><h2>Documentation</h2><p>You have a look at the documentation <a href="https://joshghent.github.io/query-stringifier/">here</a>.</p>
+// { food: pizza, bar: chocolate }
+
+// Extract query string from url
+qs.extract('http://test.com?food=pizza&bar=chocolate');
+// food=pizza&bar=chocolate</code></pre><h2>Tests</h2><pre class="prettyprint source"><code>$ npm test</code></pre><h2>Documentation</h2><p>You have a look at the documentation <a href="https://joshghent.github.io/query-stringifier/">here</a>.</p>
 <p>If you ever edit the documentation and wants to generate a new version of it just run the command:</p>
 <pre class="prettyprint source"><code>$ npm run docs</code></pre><p>Commit your changes and push them to master. Github pages will update the page automatically.</p>
 <h2>Issues?</h2><p>Go <a href="https://github.com/joshghent/query-stringifier/issues">here</a></p>
diff --git a/docs/index.js.html b/docs/index.js.html
index 31296dc..e2ff457 100644
--- a/docs/index.js.html
+++ b/docs/index.js.html
@@ -34,7 +34,7 @@ <h1><a href="index.html" class="link">QueryString</a></h1>
         <ul></ul>
     </div>
     
-    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
+    <div class="lnb-api hidden"><h3>Classes</h3><ul><li><a href="QueryString.html">QueryString</a><button type="button" class="hidden toggle-subnav btn btn-link">  <span class="glyphicon glyphicon-plus"></span></button><div class="hidden" id="QueryString_sub"><div class="member-type">Methods</div><ul class="inner"><li><a href="QueryString.html#extract">extract</a></li><li><a href="QueryString.html#parse">parse</a></li><li><a href="QueryString.html#stringify">stringify</a></li></ul></div></li></ul></div>
 </nav>
 <div id="resizer"></div>
 
@@ -142,8 +142,18 @@ <h1><a href="index.html" class="link">QueryString</a></h1>
     return obj;
 }
 
+/**
+ * Extract the query string sentence from any url. If there is no query string, empty string should be returned.
+ * @param {string} url - url which contains
+ * @returns {string} Extracted query string from url
+ */
 QueryString.prototype.extract = function (url) {
-    return url.substring(url.indexOf('?') + 1);
+    const queryStringPosition = url.indexOf('?')
+    const isThereQueryString = queryStringPosition > -1
+
+    if (!isThereQueryString) return ''
+
+    return url.substring(queryStringPosition + 1);
 }
 
 // Export the module
diff --git a/index.js b/index.js
index 71e951b..a92c630 100644
--- a/index.js
+++ b/index.js
@@ -94,8 +94,18 @@ QueryString.prototype.parse = function (queryStr) {
     return obj;
 }
 
+/**
+ * Extract the query string sentence from any url. If there is no query string, empty string should be returned.
+ * @param {string} url - url which contains
+ * @returns {string} Extracted query string from url
+ */
 QueryString.prototype.extract = function (url) {
-    return url.substring(url.indexOf('?') + 1);
+    const queryStringPosition = url.indexOf('?')
+    const isThereQueryString = queryStringPosition > -1
+
+    if (!isThereQueryString) return ''
+
+    return url.substring(queryStringPosition + 1);
 }
 
 // Export the module
diff --git a/test.js b/test.js
index 998c918..fe6390d 100644
--- a/test.js
+++ b/test.js
@@ -62,12 +62,19 @@ describe('query-stringifier', function () {
     });
 
     describe('#extract', function () {
-        it('exract the query string of the url', function() {
+        it('extract the query string of the url', function() {
             var url = 'www.dummyurl.com?firstqueryparam=first&secondqueryparam=second';
             var result = qs.extract(url);
 
             expect(result).to.equal('firstqueryparam=first&secondqueryparam=second');
         });
+
+        it('should return empty if there is no query string', function() {
+            var url = 'www.dummyurl.com';
+            var result = qs.extract(url);
+
+            expect(result).to.equal('');
+        });
     });
 
     describe('#extract/#parse', function() {