diff --git a/Services/WorkspaceHelper.cs b/Services/WorkspaceHelper.cs
index 7f7ece7..ff31357 100644
--- a/Services/WorkspaceHelper.cs
+++ b/Services/WorkspaceHelper.cs
@@ -27,12 +27,11 @@ public static class WorkspaceHelper
     }
 
     /// <summary>
-    /// Gibt den relativen Pfad zurück – immer mit Forward-Slashes (für Agent-Output/API).
+    /// Gibt den relativen Pfad zurück – mit nativen Separatoren (Backslash auf Windows, / auf Linux).
     /// </summary>
     internal static string GetRelativePath(string relativeTo, string path)
     {
-        var rel = Path.GetRelativePath(relativeTo, path);
-        return IsWindows ? rel.Replace('\\', '/') : rel;
+        return Path.GetRelativePath(relativeTo, path);
     }
 
     /// <summary>
diff --git a/wwwroot/index.html b/wwwroot/index.html
index a6ba14a..2fcb332 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -701,7 +701,7 @@
         <input type="password" id="adminPassword" placeholder="Passwort" autocomplete="new-password">
         <label>Standard-Pfad</label>
         <div class="input-with-btn">
-          <input type="text" id="adminDefaultPath" placeholder="z.B. /home/user/projects" autocomplete="off">
+          <input type="text" id="adminDefaultPath" autocomplete="off">
           <button type="button" id="adminDefaultPathBrowse" class="icon-btn"><i class="fa fa-folder"></i></button>
         </div>
         <div class="admin-checkbox-row">
diff --git a/wwwroot/js/file-explorer.js b/wwwroot/js/file-explorer.js
index e966673..468a2ba 100644
--- a/wwwroot/js/file-explorer.js
+++ b/wwwroot/js/file-explorer.js
@@ -73,7 +73,8 @@ function openFileExplorer(opts = {}) {
   // Zum Verzeichnis der initialFile navigieren, oder Root
   if (_feState.initialFile) {
     const filePath = _feState.initialFile;
-    const dir = filePath.includes('/') ? filePath.substring(0, filePath.lastIndexOf('/')) : '';
+    const lastSep = Math.max(filePath.lastIndexOf('/'), filePath.lastIndexOf('\\'));
+    const dir = lastSep >= 0 ? filePath.substring(0, lastSep) : '';
     feLoadDir(dir);
   } else {
     feLoadDir('');
@@ -128,7 +129,8 @@ async function feLoadDir(path) {
       upItem.innerHTML = '<i class="fa fa-folder"></i> ..';
       upItem.addEventListener('click', () => {
         _feState.history.push(path);
-        const parent = path.includes('/') ? path.substring(0, path.lastIndexOf('/')) : '';
+        const lastSep = Math.max(path.lastIndexOf('/'), path.lastIndexOf('\\'));
+        const parent = lastSep >= 0 ? path.substring(0, lastSep) : '';
         feLoadDir(parent);
       });
       sidebar.appendChild(upItem);
@@ -490,7 +492,7 @@ function openFolderBrowser(opts = {}) {
     mode: 'folder',
     onSelect: opts.onSelect || null,
     currentAbsPath: opts.startPath || '/',
-    basePath: (opts.basePath || '').replace(/\/+$/, '') || null,
+    basePath: (opts.basePath || '').replace(/[\\/]+$/, '') || null,
     history: []
   };
 
@@ -635,7 +637,8 @@ async function fbCreateDir() {
     return;
   }
 
-  const absPath = _feState.currentAbsPath.replace(/\/$/, '') + '/' + dirName;
+  const sep = _feState.currentAbsPath.includes('\\') ? '\\' : '/';
+  const absPath = _feState.currentAbsPath.replace(/[\\/]+$/, '') + sep + dirName;
 
   try {
     const resp = await fetch(`/api/workspace/browse/mkdir?path=${encodeURIComponent(absPath)}`, { method: 'POST' });
@@ -664,7 +667,8 @@ async function feCreateDir() {
     return;
   }
 
-  const newPath = _feState.currentPath ? _feState.currentPath + '/' + dirName : dirName;
+  const sep = _feState.currentPath.includes('\\') ? '\\' : '/';
+  const newPath = _feState.currentPath ? _feState.currentPath + sep + dirName : dirName;
 
   try {
     const url = _feApiUrl('mkdir', `path=${encodeURIComponent(newPath)}`);