diff --git a/app.py b/app.py
index b8657ec..0485bd7 100644
--- a/app.py
+++ b/app.py
@@ -5,7 +5,7 @@ import threading
 from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime
 from pathlib import Path
-from typing import Optional
+from typing import List, Optional
 
 import markdown as md
 import requests
@@ -578,6 +578,7 @@ def library(project_id: Optional[str] = None, q_title: str = "", q_content: str
     rows = "".join(
         [
             f"<tr>"
+            f"<td style='width:36px'><input type='checkbox' class='form-check-input row-cb' value='{d['id']}'></td>"
             f"<td>#{d['id']}</td>"
             f"<td>{d['title']}</td>"
             f"<td>{d['kind']}</td>"
@@ -619,20 +620,75 @@ def library(project_id: Optional[str] = None, q_title: str = "", q_content: str
     <div class='col-6 col-md-1 d-grid'><a class='btn btn-outline-secondary' href='/library'>Reset</a></div>
   </div>
 </form>
+<div id='bulkBar' class='alert alert-primary d-none d-flex align-items-center gap-2 py-2 mb-2' role='alert'>
+  <strong id='bulkCount'>0 ausgewählt</strong>
+  <button type='button' class='btn btn-sm btn-primary' onclick='bulkMove()'><i class='bi bi-folder-symlink'></i> Verschieben</button>
+  <button type='button' class='btn btn-sm btn-danger' onclick='bulkDelete()'><i class='bi bi-trash'></i> Löschen</button>
+</div>
 <div class='card'>
   <div class='table-responsive'>
     <table class='table table-sm table-striped align-middle mb-0'>
-      <thead><tr><th>ID</th><th>Titel</th><th>Typ</th><th>Projekt</th><th>Erstellt</th><th>Aktionen</th></tr></thead>
-      <tbody>{rows or "<tr><td colspan='6' class='text-secondary'>Keine Einträge.</td></tr>"}</tbody>
+      <thead><tr>
+        <th style='width:36px'><input type='checkbox' class='form-check-input' id='cbAll' title='Alle wählen'></th>
+        <th>ID</th><th>Titel</th><th>Typ</th><th>Projekt</th><th>Erstellt</th><th>Aktionen</th>
+      </tr></thead>
+      <tbody>{rows or "<tr><td colspan='7' class='text-secondary'>Keine Einträge.</td></tr>"}</tbody>
     </table>
   </div>
 </div>
+<div class='d-flex gap-2 mt-2'>
+  <button type='button' class='btn btn-sm btn-outline-secondary' onclick='selectAll()'><i class='bi bi-check2-all'></i> Alle wählen</button>
+  <button type='button' class='btn btn-sm btn-outline-secondary' onclick='selectNone()'><i class='bi bi-x-square'></i> Alle abwählen</button>
+</div>
 <script>
 async function libPost(url, data) {{
   const r = await fetch(url, {{method:'POST', headers:{{'Content-Type':'application/x-www-form-urlencoded'}}, body:new URLSearchParams(data)}});
   if(!r.ok) {{ alert('Fehler '+r.status); return; }}
   location.reload();
 }}
+async function libPostMulti(url, params) {{
+  const body = new URLSearchParams();
+  for(const [k,v] of Object.entries(params)) {{
+    if(Array.isArray(v)) v.forEach(x => body.append(k, x));
+    else body.append(k, v);
+  }}
+  const r = await fetch(url, {{method:'POST', headers:{{'Content-Type':'application/x-www-form-urlencoded'}}, body}});
+  if(!r.ok) {{ alert('Fehler '+r.status); return; }}
+  location.reload();
+}}
+function getSelected() {{
+  return [...document.querySelectorAll('.row-cb:checked')].map(cb => cb.value);
+}}
+function updateBulkBar() {{
+  const ids = getSelected();
+  const all = document.querySelectorAll('.row-cb');
+  document.getElementById('bulkCount').textContent = ids.length + ' ausgewählt';
+  document.getElementById('bulkBar').classList.toggle('d-none', ids.length === 0);
+  const cbAll = document.getElementById('cbAll');
+  cbAll.indeterminate = ids.length > 0 && ids.length < all.length;
+  cbAll.checked = all.length > 0 && ids.length === all.length;
+}}
+document.querySelectorAll('.row-cb').forEach(cb => {{
+  cb.addEventListener('change', function() {{
+    this.closest('tr').classList.toggle('table-active', this.checked);
+    updateBulkBar();
+  }});
+}});
+document.getElementById('cbAll').addEventListener('change', function() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{
+    cb.checked = this.checked;
+    cb.closest('tr').classList.toggle('table-active', this.checked);
+  }});
+  updateBulkBar();
+}});
+function selectAll() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{ cb.checked=true; cb.closest('tr').classList.add('table-active'); }});
+  updateBulkBar();
+}}
+function selectNone() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{ cb.checked=false; cb.closest('tr').classList.remove('table-active'); }});
+  updateBulkBar();
+}}
 window.libRename = async function(id, current) {{
   const v = await window.uiPrompt('Dokument umbenennen', current || '');
   if(v===null) return;
@@ -649,6 +705,21 @@ window.libDelete = async function(id) {{
   if(!ok) return;
   await libPost(`/document/${{id}}/delete`, {{}});
 }};
+window.bulkMove = async function() {{
+  const ids = getSelected();
+  if(!ids.length) return;
+  const options = {project_js};
+  const v = await window.uiSelect(`${{ids.length}} Dokumente verschieben`, options, 'Projekt wählen');
+  if(v===null || v==='') return;
+  await libPostMulti('/documents/bulk-move', {{ids, project_id:v}});
+}};
+window.bulkDelete = async function() {{
+  const ids = getSelected();
+  if(!ids.length) return;
+  const ok = await window.uiConfirm(`${{ids.length}} Dokumente löschen?`);
+  if(!ok) return;
+  await libPostMulti('/documents/bulk-delete', {{ids}});
+}};
 </script>
 """
     return layout("Library", body)
@@ -755,6 +826,20 @@ def delete_document(doc_id: int):
     return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
 
 
+@app.post("/documents/bulk-move", response_class=HTMLResponse)
+def bulk_move_documents(ids: List[int] = Form(...), project_id: int = Form(...)):
+    with db() as c:
+        c.executemany("UPDATE documents SET project_id=? WHERE id=?", [(project_id, i) for i in ids])
+    return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
+
+
+@app.post("/documents/bulk-delete", response_class=HTMLResponse)
+def bulk_delete_documents(ids: List[int] = Form(...)):
+    with db() as c:
+        c.executemany("DELETE FROM documents WHERE id=?", [(i,) for i in ids])
+    return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
+
+
 @app.get("/prompts", response_class=HTMLResponse)
 def prompts_page():
     with db() as c: