- add pdf sign tool to tools.json and sidebar.html, add screenshot

Author: TobiasMue91

data/tools.json

@@ -1549,5 +1549,16 @@
     "aiPowered": false,
     "featured": false,
     "date": "2025-05-30"
+  },
+  {
+    "id": "pdf_sign",
+    "title": "PDF Sign Tool",
+    "description": "Free online PDF signing tool. Upload your PDF, draw your signature, and place it anywhere on the document. No registration required - sign PDFs instantly in your browser.",
+    "url": "tools/pdf_sign.html",
+    "screenshot": "screenshots/screenshot_203.webp",
+    "type": "tool",
+    "aiPowered": false,
+    "featured": false,
+    "date": "2025-05-30"
   }
 ]

screenshots/screenshot_203.webp

@@ -288,6 +288,7 @@ <h2>Tools by ChatGPT</h2>
       <li><a href="/tools/video_frame_extractor.html">Video Frame Extractor</a></li>
       <li><a href="/tools/pdf_splitter.html">PDF Splitter</a></li>
       <li><a href="/tools/metronome.html">Metronome</a></li>
+      <li><a href="/tools/pdf_sign.html">PDF Sign Tool</a></li>
 <!-- end -->
     </ul>
   </div>