- add running page calculator to sidebar.html and tools.json, add screenshot

Author: TobiasMue91

data/tools.json

@@ -1758,5 +1758,16 @@
     "aiPowered": false,
     "featured": false,
     "date": "2025-10-25"
+  },
+  {
+    "id": "running_pace_calculator",
+    "title": "Running Pace Calculator",
+    "description": "Free online Running Pace Calculator with race predictions, split times, and training zones. Calculate pace, time, or distance for your runs. Perfect for marathon training and race planning.",
+    "url": "tools/running_pace_calculator.html",
+    "screenshot": "screenshots/screenshot_226.webp",
+    "type": "tool",
+    "aiPowered": false,
+    "featured": false,
+    "date": "2025-10-25"
   }
 ]

screenshots/screenshot_226.webp

@@ -311,6 +311,7 @@ <h2>Tools by ChatGPT</h2>
       <li><a href="/tools/audio_pitch_shifter.html">Audio Pitch Shifter</a></li>
       <li><a href="/tools/time_lapse_creator.html">Time Lapse Creator</a></li>
       <li><a href="/tools/tip_calculator.html">Tip Calculator & Bill Splitter</a></li>
+      <li><a href="/tools/running_pace_calculator.html">Running Pace Calculator</a></li>
 <!-- end -->
     </ul>
   </div>