diff --git a/website/index.html b/website/index.html
index 6cfbb74..7eca030 100644
--- a/website/index.html
+++ b/website/index.html
@@ -97,7 +97,9 @@
   }
 </style>
 <div id="header">
-  <div><a href="https://meshmap.net/" title="A nearly live map of Meshtastic nodes seen by the official Meshtastic MQTT server">MeshMap</a></div>
+  <div>
+    <a href="https://meshmap.net/" title="A nearly live map of Meshtastic nodes seen by the official Meshtastic MQTT server">MeshMap</a>
+  </div>
   <div>
     <a
       href="#"
@@ -126,8 +128,10 @@
     182, 91, 46, 23, 11, 6, 3, 1,
     1, 0, 0, 0, 0, 0, 0, 0
   ]
-  // encodes html reserved characters
-  const html = str => str?.replace(/["&<>]/g, match => `&#${match.charCodeAt(0)};`)
+  // encodes html reserved characters and ascii control characters
+  const html = str => str
+    ?.replace(/[\x00-\x1F]/g, c => `\\x${c.charCodeAt(0).toString(16).toUpperCase().padStart(2, '0')}`)
+    .replace(/["&<>]/g, c => `&#${c.charCodeAt(0)};`)
   // makes more human-readable time duration strings
   const duration = d => {
     let s = ''
@@ -232,22 +236,23 @@
       <div class="title">${html(longName)} (${html(shortName)})</div>
       <div>${nodeLink(nodeNum, id)} | ${html(role)} | ${html(hwModel)}</div>
       <table><tbody>
-      ${fwVersion ? `<tr><th>Firmware</th><td>${html(fwVersion)}</td></tr>` : ''}
-      ${region ? `<tr><th>Region</th><td>${html(region)}</td></tr>` : ''}
-      ${modemPreset ? `<tr><th>Modem preset</th><td>${html(modemPreset)}</td></tr>` : ''}
-      ${hasDefaultCh ? `<tr><th>Has default channel</th><td>True</td></tr>` : ''}
-      ${onlineLocalNodes ? `<tr><th>Online local nodes</th><td>${onlineLocalNodes}</td></tr>` : ''}
-      ${batteryLevel ? `<tr><th>Power</th><td>${batteryLevel > 100 ? 'Plugged in' : `${batteryLevel}%`}${voltage ? ` (${voltage.toFixed(2)}V)` : ''}</td></tr>` : ''}
-      ${chUtil ? `<tr><th>ChUtil</th><td>${chUtil.toFixed(2)}%</td></tr>` : ''}
-      ${airUtilTx ? `<tr><th>AirUtilTX</th><td>${airUtilTx.toFixed(2)}%</td></tr>` : ''}
-      ${uptime ? `<tr><th>Uptime</th><td>${duration(uptime)}</td></tr>` : ''}
-      ${temperature ? `<tr><th>Temperature</th><td>${temperature.toFixed(1)}&#8451; / ${(temperature * 1.8 + 32).toFixed(1)}&#8457;</td></tr>` : ''}
-      ${relativeHumidity ? `<tr><th>Relative Humidity</th><td>${Math.round(relativeHumidity)}%</td></tr>` : ''}
+      ${fwVersion          ? `<tr><th>Firmware</th><td>${html(fwVersion)}</td></tr>`                               : ''}
+      ${region             ? `<tr><th>Region</th><td>${html(region)}</td></tr>`                                    : ''}
+      ${modemPreset        ? `<tr><th>Modem preset</th><td>${html(modemPreset)}</td></tr>`                         : ''}
+      ${hasDefaultCh       ? `<tr><th>Has default channel</th><td>True</td></tr>`                                  : ''}
+      ${onlineLocalNodes   ? `<tr><th>Online local nodes</th><td>${onlineLocalNodes}</td></tr>`                    : ''}
+      ${batteryLevel       ? `<tr><th>Power</th><td>${batteryLevel > 100 ? 'Plugged in' : `${batteryLevel}%`}` +
+                             `${voltage ? ` (${voltage.toFixed(2)}V)` : ''}</td></tr>`                             : ''}
+      ${chUtil             ? `<tr><th>ChUtil</th><td>${chUtil.toFixed(2)}%</td></tr>`                              : ''}
+      ${airUtilTx          ? `<tr><th>AirUtilTX</th><td>${airUtilTx.toFixed(2)}%</td></tr>`                        : ''}
+      ${uptime             ? `<tr><th>Uptime</th><td>${duration(uptime)}</td></tr>`                                : ''}
+      ${temperature        ? `<tr><th>Temperature</th><td>${temperature.toFixed(1)}&#8451; / ` +
+                             `${(temperature * 1.8 + 32).toFixed(1)}&#8457;</td></tr>`                             : ''}
+      ${relativeHumidity   ? `<tr><th>Relative Humidity</th><td>${Math.round(relativeHumidity)}%</td></tr>`        : ''}
       ${barometricPressure ? `<tr><th>Barometric Pressure</th><td>${Math.round(barometricPressure)} hPa</td></tr>` : ''}
-      ${altitude ? `<tr><th>Altitude</th><td>${altitude.toLocaleString()} m above MSL</td></tr>` : ''}
-      ${precision && precisionMargins[precision-1] ?
-        `<tr><th>Location precision</th><td>&#177; ${precisionMargins[precision-1].toLocaleString()} m (orange circle)</td></tr>` : ''
-      }
+      ${altitude           ? `<tr><th>Altitude</th><td>${altitude.toLocaleString()} m above MSL</td></tr>`         : ''}
+      ${precision && precisionMargins[precision-1] ? "<tr><th>Location precision</th><td>&#177;" +
+                             `${precisionMargins[precision-1].toLocaleString()} m (orange circle)</td></tr>`       : ''}
       </tbody></table>
       <table><thead>
       <tr><th>Last seen</th><th>via</th><th>root topic</th><th>channel</th></tr>
@@ -255,7 +260,9 @@
       ${Array.from(
         new Map(
           Object.entries(seenBy)
-            .map(([topic, seen]) => (m => ({seen, via: m[3] ?? id, root: m[1], chan: m[2]}))(topic.match(/^(.*)(?:\/2\/e\/(.*)\/(![0-9a-f]+)|\/2\/map\/)$/)))
+            .map(([topic, seen]) => (m => ({seen, via: m[3] ?? id, root: m[1], chan: m[2]}))(
+              topic.match(/^(.*)(?:\/2\/e\/(.*)\/(![0-9a-f]+)|\/2\/map\/)$/s)
+            ))
             .sort((a, b) => a.seen - b.seen)
             .map(v => [v.via, v])
         ).values(),