diff --git a/Endpoints/ApiKeysEndpoint.cs b/Endpoints/ApiKeysEndpoint.cs
index 855d293..a67b5fb 100644
--- a/Endpoints/ApiKeysEndpoint.cs
+++ b/Endpoints/ApiKeysEndpoint.cs
@@ -29,6 +29,7 @@ public static class ApiKeysEndpoint
         app.MapPost("/api/admin/api-keys/scan", HandleScanTrigger);
         app.MapGet("/api/admin/api-keys/scan/status", HandleScanStatus);
         app.MapGet("/api/admin/api-keys/scanned", HandleGetScanned);
+        app.MapPost("/api/admin/api-keys/scanned/recheck-all", HandleRecheckAll);
         app.MapPost("/api/admin/api-keys/scanned/{id}/recheck", HandleRecheck);
         app.MapPost("/api/admin/api-keys/scanned/{id}/adopt", HandleAdopt);
         app.MapDelete("/api/admin/api-keys/scanned/{id}", HandleDeleteScanned);
@@ -274,6 +275,27 @@ public static class ApiKeysEndpoint
         await ctx.Response.WriteAsJsonAsync(result);
     }
 
+    private static async Task HandleRecheckAll(HttpContext ctx, DatabaseService db, KeyScannerService scanner)
+    {
+        if (!ctx.IsAdmin()) { ctx.Response.StatusCode = 403; return; }
+
+        var keys = await db.GetScannedKeys();
+        var notAdopted = keys.Where(k => k.AdoptedApiKeyId == null).ToList();
+
+        int success = 0, errors = 0;
+        foreach (var sk in notAdopted)
+        {
+            try
+            {
+                await scanner.CheckAndUpdateKey(sk);
+                success++;
+            }
+            catch { errors++; }
+        }
+
+        await ctx.Response.WriteAsJsonAsync(new { ok = true, total = notAdopted.Count, success, errors });
+    }
+
     private static async Task HandleRecheck(HttpContext ctx, DatabaseService db, KeyScannerService scanner, string id)
     {
         if (!ctx.IsAdmin()) { ctx.Response.StatusCode = 403; return; }
diff --git a/wwwroot/index.html b/wwwroot/index.html
index 498d926..b66cbb6 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -585,6 +585,7 @@
           <h2>Key Scanner</h2>
           <div style="display:flex;gap:.5rem;align-items:center">
             <span id="scanStatus" class="admin-user-meta" style="font-size:.85em"></span>
+            <button id="recheckAllScannedBtn" class="section-add-btn"><i class="fa fa-refresh"></i> Alle prüfen</button>
             <button id="scanQuickBtn" class="section-add-btn"><i class="fa fa-bolt"></i> Quick</button>
             <button id="scanWebBtn" class="section-add-btn"><i class="fa fa-globe"></i> Web</button>
             <button id="scanFullBtn" class="section-add-btn"><i class="fa fa-search"></i> Full</button>
diff --git a/wwwroot/js/api.js b/wwwroot/js/api.js
index c12e9a7..0e99a4d 100644
--- a/wwwroot/js/api.js
+++ b/wwwroot/js/api.js
@@ -235,6 +235,7 @@ function apiCheckAllApiKeys() { return _post('/api/admin/api-keys/check-all', un
 function apiTriggerScan(mode) { return _post('/api/admin/api-keys/scan?mode=' + (mode || 'full'), undefined, 'Fehler beim Starten des Scans'); }
 function apiScanStatus() { return _get('/api/admin/api-keys/scan/status', {}); }
 function apiGetScannedKeys() { return _get('/api/admin/api-keys/scanned', []); }
+function apiRecheckAllScannedKeys() { return _post('/api/admin/api-keys/scanned/recheck-all', undefined, 'Fehler beim Prüfen'); }
 function apiRecheckScannedKey(id) { return _post('/api/admin/api-keys/scanned/' + id + '/recheck', undefined, 'Fehler beim Prüfen'); }
 function apiAdoptScannedKey(id) { return _post('/api/admin/api-keys/scanned/' + id + '/adopt', undefined, 'Fehler beim Übernehmen'); }
 function apiDeleteScannedKey(id) { return _del('/api/admin/api-keys/scanned/' + id, 'Fehler beim Löschen'); }
diff --git a/wwwroot/js/pages/api-keys-page.js b/wwwroot/js/pages/api-keys-page.js
index f378087..ceec24f 100644
--- a/wwwroot/js/pages/api-keys-page.js
+++ b/wwwroot/js/pages/api-keys-page.js
@@ -318,6 +318,7 @@ registerPage('api-keys', {
     var scanQuickBtn = document.getElementById('scanQuickBtn');
     var scanWebBtn = document.getElementById('scanWebBtn');
     var scanFullBtn = document.getElementById('scanFullBtn');
+    var recheckAllScannedBtn = document.getElementById('recheckAllScannedBtn');
     var scanBtns = [scanQuickBtn, scanWebBtn, scanFullBtn];
     var scanStatusEl = document.getElementById('scanStatus');
     var scannedList = document.getElementById('scannedKeysList');
@@ -497,6 +498,21 @@ registerPage('api-keys', {
     scanWebBtn.addEventListener('click', function() { triggerScan('web', scanWebBtn); });
     scanFullBtn.addEventListener('click', function() { triggerScan('full', scanFullBtn); });
 
+    recheckAllScannedBtn.addEventListener('click', async function() {
+      recheckAllScannedBtn.disabled = true;
+      recheckAllScannedBtn.innerHTML = '<i class="fa fa-spinner fa-spin"></i> Prüfe…';
+      try {
+        var result = await apiRecheckAllScannedKeys();
+        showToast('Alle geprüft: ' + result.success + '/' + result.total + ' OK' + (result.errors > 0 ? ', ' + result.errors + ' Fehler' : ''), result.errors > 0 ? 'warning' : 'success');
+        await loadScannedKeys();
+      } catch(e) {
+        showToast('Fehler beim Prüfen', 'error');
+      } finally {
+        recheckAllScannedBtn.disabled = false;
+        recheckAllScannedBtn.innerHTML = '<i class="fa fa-refresh"></i> Alle prüfen';
+      }
+    });
+
     await loadScannedKeys();
     await updateScanStatus();
   },
diff --git a/wwwroot/js/ui-helpers.js b/wwwroot/js/ui-helpers.js
index c57e8df..1d49dbe 100644
--- a/wwwroot/js/ui-helpers.js
+++ b/wwwroot/js/ui-helpers.js
@@ -134,8 +134,14 @@ function initMoreButton(moreEl) {
   if (!moreEl) return;
   moreEl.addEventListener('click', () => {
     const content = moreEl.querySelector('[hidden]');
-    while (content.firstChild) moreEl.parentNode.insertBefore(content.firstChild, moreEl);
+    const parent = moreEl.parentNode;
+    while (content.firstChild) parent.insertBefore(content.firstChild, moreEl);
     moreEl.remove();
+    // EasyMDE/CodeMirror braucht refresh() nach Sichtbarwerden
+    parent.querySelectorAll('.EasyMDEContainer').forEach(c => {
+      const cm = c.querySelector('.CodeMirror');
+      if (cm && cm.CodeMirror) cm.CodeMirror.refresh();
+    });
   });
 }