diff --git a/index.html b/index.html
index 9277c95..ef62c12 100644
--- a/index.html
+++ b/index.html
@@ -1710,6 +1710,23 @@
     </div>
     <!-- ends batch processing (Windows) -->
 
+    <!-- Check decoder errors -->
+    <label class="recipe" for="check_decoder_errors">Check decoder errors</label>
+    <input type="checkbox" id="check_decoder_errors">
+    <div class="hiding">
+      <h3>Check decoder errors</h3>
+      <p><code>ffmpeg -i <i>input_file</i> -f null -</code></p>
+      <p>This decodes your video and prints any errors or found issues to the screen.</p>
+      <dl>
+        <dt>ffmpeg</dt><dd>starts the command</dd>
+        <dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
+        <dt>-f null</dt><dd>Video is decoded with the <code>null</code> muxer. This allows video decoding without creating an output file.</dd>
+        <dt>-</dt><dd>FFmpeg syntax requires a specified output, and <code>-</code> is just a place holder. No file is actually created. </dd>
+      </dl>
+      <p class="link"></p>
+    </div>
+    <!-- ends Check decoder errors -->
+
     <!-- Check FFV1 fixity -->
     <label class="recipe" for="check_FFV1_fixity">Check FFV1 fixity</label>
     <input type="checkbox" id="check_FFV1_fixity">
@@ -1728,7 +1745,7 @@
       <p class="link"></p>
     </div>
     <!-- ends Check FFV1 Fixity -->
-    
+
     <!-- Create frame md5s -->
     <label class="recipe" for="create_frame_md5s_v">Create MD5 checksums (video frames)</label>
     <input type="checkbox" id="create_frame_md5s_v">