diff --git a/docs/2023-06-25-useful-tools.html b/docs/2023-06-25-useful-tools.html
index 08ae94e..c0c2f84 100644
--- a/docs/2023-06-25-useful-tools.html
+++ b/docs/2023-06-25-useful-tools.html
@@ -843,6 +843,10 @@ xcode-select --install</pre>
       <li><code>~/Library/LaunchAgents</code></li>
       <li><code>/Library/LaunchAgents</code></li>
     </ul>
+    <p>Clean up clipboard:</p>
+    <div class="highlight highlight-source-shell">
+      <pre>pbcopy <span class="pl-k">&lt;</span> /dev/null</pre>
+    </div>
     <h3 id="user-content-linux">
       <a class="heading-link" href="#linux"
         >Linux<span aria-hidden="true" class="octicon octicon-link"></span
diff --git a/posts/2023-06-25-useful-tools.md b/posts/2023-06-25-useful-tools.md
index 64fe243..d6d9970 100644
--- a/posts/2023-06-25-useful-tools.md
+++ b/posts/2023-06-25-useful-tools.md
@@ -233,6 +233,12 @@ Clean up leftover data:
 - `~/Library/LaunchAgents`
 - `/Library/LaunchAgents`
 
+Clean up clipboard:
+
+```sh
+pbcopy < /dev/null
+```
+
 ### Linux
 
 Fix black screen when open game in fullscreen in external monitor with