diff --git a/src/content/content.js b/src/content/content.js
index 443b86c..d109ae7 100644
--- a/src/content/content.js
+++ b/src/content/content.js
@@ -276,9 +276,27 @@
     }
 
     // 4. Auto-detect: scan the FINAL text for unconfigured PPI
+    //    Auto-redact if enabled, otherwise just warn
     if (settings.autoDetect !== false) {
       const warnings = autoDetectPPI(finalText, identity);
       if (warnings.length > 0) {
+        // Auto-redact detected PPI in the outbound text
+        if (settings.autoRedactDetected !== false) {
+          for (let i = warnings.length - 1; i >= 0; i--) {
+            const w = warnings[i];
+            const fake = generateFake(w.name, w.value);
+            const escaped = esc(w.value);
+            const regex = new RegExp(escaped, 'g');
+            finalText = finalText.replace(regex, fake);
+            allReplacements.push({
+              original: w.value,
+              replaced: fake,
+              category: 'auto-detect',
+              pattern: w.name,
+            });
+          }
+        }
+        // Still show the warning so user knows what was caught
         showAutoDetectWarning(warnings);
       }
     }
@@ -1009,34 +1027,32 @@
   // Pre-Send PPI Detection — scans as you type/paste (spellcheck style)
   // ============================================================
 
-  // Generate plausible fake values for detected PPI
+  // Generate obviously-fake values using reserved/standard ranges
+  // These are recognizable as placeholders and guaranteed not to be real
   function generateFake(type, value) {
     switch (type) {
       case 'Private IP':
       case 'Public IP':
-        return '10.' + rnd(1,254) + '.' + rnd(1,254) + '.' + rnd(1,254);
+        // RFC 5737 — reserved for documentation, never routed
+        return '192.0.2.1';
       case 'MAC Address':
-        return Array.from({length:6}, () => rnd(0,255).toString(16).padStart(2,'0')).join(':');
+        return '00:00:00:00:00:00';
       case 'Street Address':
-        const streets = ['Oak', 'Maple', 'Pine', 'Cedar', 'Elm', 'Main', 'Park', 'Lake'];
-        const types = ['St', 'Ave', 'Dr', 'Ln', 'Rd'];
-        return rnd(100,9999) + ' ' + streets[rnd(0,7)] + ' ' + types[rnd(0,4)];
+        return '123 Example Street, Anytown, ST 00000';
       case 'GPS Coordinates':
-        return (rnd(-90,90) + Math.random()).toFixed(6) + ',' + (rnd(-180,180) + Math.random()).toFixed(6);
+        return '0.000000,0.000000';
       case 'Date (possible DOB)':
-        return (rnd(1,12) + '').padStart(2,'0') + '/' + (rnd(1,28) + '').padStart(2,'0') + '/' + rnd(1950,2005);
+        return '01/01/1970';
       case 'EIN / Tax ID':
-        return rnd(10,99) + '-' + (rnd(1000000,9999999) + '');
-      case 'Home Path': {
-        const fakeUser = 'user' + rnd(100,999);
-        if (value.startsWith('C:\\')) return 'C:\\Users\\' + fakeUser;
-        if (value.startsWith('/Users/')) return '/Users/' + fakeUser;
-        return '/home/' + fakeUser;
-      }
+        return '00-0000000';
+      case 'Home Path':
+        if (value.startsWith('C:\\')) return 'C:\\Users\\user';
+        if (value.startsWith('/Users/')) return '/Users/user';
+        return '/home/user';
       case 'Shell Prompt':
-        return 'user@computer:$ ';
+        return 'user@host:$ ';
       case 'Git Remote':
-        return value.replace(/[:/][^/\s]+\//, ':/anonymous/');
+        return value.replace(/[:/][^/\s]+\//, ':/example/');
       case 'Env Variable':
         return value.split('=')[0] + '=REDACTED';
       default:
@@ -1044,10 +1060,6 @@
     }
   }
 
-  function rnd(min, max) {
-    return Math.floor(Math.random() * (max - min + 1)) + min;
-  }
-
   // Pre-send warning UI
   let preSendWarningEl = null;
   let preSendTimer = null;
@@ -1082,8 +1094,8 @@
       ${items}
       ${more}
       <div class="ss-ad-footer">
-        ${settings.autoAddDetected !== false ? 'Click + to auto-add a mapping.' : ''}
-        Add to Identity or Mappings to protect this data.
+        ${settings.autoRedactDetected !== false ? 'Auto-redacted with standard placeholders.' : 'These were sent as-is.'}
+        ${settings.autoAddDetected !== false ? ' Click + to add a permanent mapping.' : ''}
       </div>
     `;
 
diff --git a/src/lib/storage.js b/src/lib/storage.js
index 9b8a2bc..0e6664e 100644
--- a/src/lib/storage.js
+++ b/src/lib/storage.js
@@ -20,6 +20,7 @@ const DEFAULT_SETTINGS = {
   revealMode: false,
   secretScanning: true,
   autoDetect: true,
+  autoRedactDetected: true,
   autoAddDetected: true,
   maxLogEntries: 200,
   customDomains: [],
diff --git a/src/options/options.html b/src/options/options.html
index 502a00a..facd3e3 100644
--- a/src/options/options.html
+++ b/src/options/options.html
@@ -67,6 +67,16 @@
           <span class="toggle-slider"></span>
         </label>
       </div>
+      <div class="setting-row">
+        <div>
+          <label>Auto-redact detected PPI on send</label>
+          <p class="setting-desc">Automatically replace detected PPI with generic placeholders (192.0.2.1, 123 Example Street, etc.) when sending</p>
+        </div>
+        <label class="toggle">
+          <input type="checkbox" id="autoRedactDetected" checked>
+          <span class="toggle-slider"></span>
+        </label>
+      </div>
       <div class="setting-row">
         <div>
           <label>Offer to auto-add detected PPI</label>
diff --git a/src/options/options.js b/src/options/options.js
index 24fafcf..3ffe967 100644
--- a/src/options/options.js
+++ b/src/options/options.js
@@ -15,6 +15,7 @@ document.addEventListener('DOMContentLoaded', async () => {
   $('#showHighlights').checked = settings.showHighlights || false;
   $('#secretScanning').checked = settings.secretScanning !== false;
   $('#autoDetect').checked = settings.autoDetect !== false;
+  $('#autoRedactDetected').checked = settings.autoRedactDetected !== false;
   $('#autoAddDetected').checked = settings.autoAddDetected !== false;
   $('#maxLogEntries').value = settings.maxLogEntries || 200;
 
@@ -47,6 +48,10 @@ document.addEventListener('DOMContentLoaded', async () => {
     await Storage.saveSettings({ autoDetect: e.target.checked });
   });
 
+  $('#autoRedactDetected').addEventListener('change', async (e) => {
+    await Storage.saveSettings({ autoRedactDetected: e.target.checked });
+  });
+
   $('#autoAddDetected').addEventListener('change', async (e) => {
     await Storage.saveSettings({ autoAddDetected: e.target.checked });
   });