diff --git a/backend/main.py b/backend/main.py
index a2f4fdd..74a66dd 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,11 +1,13 @@
+import io
 import os
 import re
 import shutil
+import zipfile
 from pathlib import Path
 from typing import List
 
 from fastapi import FastAPI, HTTPException, UploadFile, File
-from fastapi.responses import FileResponse
+from fastapi.responses import FileResponse, StreamingResponse
 from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel
 
@@ -117,6 +119,54 @@ def get_file(name: str, filename: str):
     return FileResponse(target)
 
 
+@app.get("/api/download-all")
+def download_all_projects():
+    projects = [p for p in PROJECTS_DIR.iterdir() if p.is_dir()]
+    files_found = False
+
+    buffer = io.BytesIO()
+    with zipfile.ZipFile(buffer, "w", zipfile.ZIP_DEFLATED) as zf:
+        for project in projects:
+            for f in project.iterdir():
+                if f.is_file() and f.suffix.lower() in ALLOWED_EXTENSIONS:
+                    zf.write(f, arcname=f"{project.name}/{f.name}")
+                    files_found = True
+
+    if not files_found:
+        raise HTTPException(404, "No files to download")
+
+    buffer.seek(0)
+    return StreamingResponse(
+        buffer,
+        media_type="application/zip",
+        headers={"Content-Disposition": 'attachment; filename="alle-projekte.zip"'},
+    )
+
+
+@app.get("/api/projects/{name}/download")
+def download_project(name: str):
+    path = safe_project_path(name)
+    if not path.exists():
+        raise HTTPException(404, "Project not found")
+
+    files = [f for f in path.iterdir() if f.is_file() and f.suffix.lower() in ALLOWED_EXTENSIONS]
+    if not files:
+        raise HTTPException(404, "Project has no files to download")
+
+    buffer = io.BytesIO()
+    with zipfile.ZipFile(buffer, "w", zipfile.ZIP_DEFLATED) as zf:
+        for f in files:
+            zf.write(f, arcname=f.name)
+    buffer.seek(0)
+
+    zip_filename = f"{name}.zip"
+    return StreamingResponse(
+        buffer,
+        media_type="application/zip",
+        headers={"Content-Disposition": f'attachment; filename="{zip_filename}"'},
+    )
+
+
 @app.delete("/api/projects/{name}/files/{filename}")
 def delete_file(name: str, filename: str):
     path = safe_project_path(name)
diff --git a/static/app.js b/static/app.js
index 64055f5..f29fd1e 100644
--- a/static/app.js
+++ b/static/app.js
@@ -75,6 +75,9 @@ async function renderDashboard() {
       <h1 class="view-title">Projekte</h1>
       <div class="view-subtitle">Lege ein Projekt an, um STL- und 3MF-Dateien zu verwalten.</div>
     </div>
+    <div class="header-actions">
+      <a class="btn" href="/api/download-all" download>Alle Projekte herunterladen</a>
+    </div>
   `;
   view.appendChild(header);
 
@@ -161,9 +164,14 @@ async function renderProject(name) {
       <h1 class="view-title"></h1>
       <div class="view-subtitle">STL- und 3MF-Dateien dieses Projekts.</div>
     </div>
-    <button class="btn btn-danger" type="button" data-action="delete-project">Projekt löschen</button>
+    <div class="header-actions">
+      <a class="btn" data-action="download-project" download>Alle herunterladen</a>
+      <button class="btn btn-danger" type="button" data-action="delete-project">Projekt löschen</button>
+    </div>
   `;
   header.querySelector(".view-title").textContent = name;
+  header.querySelector('[data-action="download-project"]').href =
+    `/api/projects/${encodeURIComponent(name)}/download`;
   header.querySelector('[data-action="delete-project"]').addEventListener("click", async () => {
     if (!confirm(`Projekt "${name}" inklusive aller Dateien löschen?`)) return;
     try {
@@ -275,6 +283,11 @@ async function loadFileGrid(projectName, container) {
     card.querySelector(".file-card-meta").textContent =
       `${file.type.toUpperCase()} · ${formatSize(file.size)}`;
 
+    const fileUrl = `/api/projects/${encodeURIComponent(projectName)}/files/${encodeURIComponent(file.name)}`;
+    const downloadLink = card.querySelector(".file-card-download");
+    downloadLink.href = fileUrl;
+    downloadLink.download = file.name;
+
     card.querySelector(".file-card-delete").addEventListener("click", async (e) => {
       e.stopPropagation();
       if (!confirm(`"${file.name}" löschen?`)) return;
diff --git a/static/index.html b/static/index.html
index ba912df..4339058 100644
--- a/static/index.html
+++ b/static/index.html
@@ -47,6 +47,7 @@
         <span class="file-card-name"></span>
         <span class="file-card-meta"></span>
       </div>
+      <a class="file-card-download" title="Datei herunterladen" download>⬇</a>
       <button class="file-card-delete" type="button" title="Datei löschen">×</button>
     </div>
   </template>
diff --git a/static/style.css b/static/style.css
index 1993038..775a9f3 100644
--- a/static/style.css
+++ b/static/style.css
@@ -312,26 +312,38 @@ button {
   color: var(--text-muted);
 }
 
-.file-card-delete {
+.file-card-delete,
+.file-card-download {
   position: absolute;
   top: 8px;
-  right: 8px;
   width: 24px;
   height: 24px;
   border-radius: 50%;
   border: 1px solid var(--border-strong);
   background: rgba(20, 23, 26, 0.85);
   color: var(--text-muted);
-  font-size: 15px;
+  font-size: 13px;
   line-height: 1;
   display: flex;
   align-items: center;
   justify-content: center;
   opacity: 0;
+  cursor: pointer;
+  text-decoration: none;
   transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
 }
 
-.file-card:hover .file-card-delete {
+.file-card-delete {
+  right: 8px;
+  font-size: 15px;
+}
+
+.file-card-download {
+  right: 38px;
+}
+
+.file-card:hover .file-card-delete,
+.file-card:hover .file-card-download {
   opacity: 1;
 }
 
@@ -340,6 +352,16 @@ button {
   border-color: var(--danger);
 }
 
+.file-card-download:hover {
+  color: var(--accent);
+  border-color: var(--accent);
+}
+
+.header-actions {
+  display: flex;
+  gap: 10px;
+}
+
 .toast {
   position: fixed;
   bottom: 24px;