diff --git a/frontend/src/components/network/DiagramHeader.tsx b/frontend/src/components/network/DiagramHeader.tsx
index f3f7e830..ab3d83f8 100644
--- a/frontend/src/components/network/DiagramHeader.tsx
+++ b/frontend/src/components/network/DiagramHeader.tsx
@@ -1,6 +1,6 @@
 import { useState, useCallback, useRef, useEffect } from 'react'
 import { useNavigate } from 'react-router-dom'
-import { ChevronLeft, Save, Download, FileJson, FileCode, Image, FileText, Undo2, Redo2, MousePointer2, Hand } from 'lucide-react'
+import { ChevronLeft, Save, Download, FileJson, FileCode, Image, FileText, Undo2, Redo2, MousePointer2, Hand, Share2 } from 'lucide-react'
 import { cn } from '@/lib/utils'
 
 export type InteractionMode = 'select' | 'pan'
@@ -18,6 +18,7 @@ interface DiagramHeaderProps {
   onExportSvg: () => void
   onExportPdf: () => void
   onExportJson: () => void
+  onExportDrawio: () => void
   onUndo: () => void
   onRedo: () => void
   canUndo: boolean
@@ -39,6 +40,7 @@ export function DiagramHeader({
   onExportSvg,
   onExportPdf,
   onExportJson,
+  onExportDrawio,
   onUndo,
   onRedo,
   canUndo,
@@ -233,6 +235,12 @@ export function DiagramHeader({
                 <FileJson size={12} /> Export JSON
               </button>
             )}
+            <button
+              onClick={() => { onExportDrawio(); setShowExportMenu(false) }}
+              className="flex w-full items-center gap-2 px-3 py-1.5 text-xs text-primary hover:bg-elevated"
+            >
+              <Share2 size={12} /> Export draw.io
+            </button>
           </div>
         )}
       </div>
diff --git a/frontend/src/lib/drawio-export.ts b/frontend/src/lib/drawio-export.ts
new file mode 100644
index 00000000..4f7b03cc
--- /dev/null
+++ b/frontend/src/lib/drawio-export.ts
@@ -0,0 +1,99 @@
+import type { Node, Edge } from '@xyflow/react'
+import type { DeviceNodeData } from '@/components/network/nodes/DeviceNode'
+import type { GroupNodeData } from '@/types/network-diagram'
+
+// Maps our device slugs to draw.io Cisco stencil shape styles
+const SLUG_TO_DRAWIO_STYLE: Record<string, string> = {
+  'router':        'shape=mxgraph.cisco.routers.router;',
+  'switch':        'shape=mxgraph.cisco.switches.layer_3_switch;',
+  'access-point':  'shape=mxgraph.cisco.misc.access_point;',
+  'load-balancer': 'shape=mxgraph.cisco.misc.generic_building;',
+  'firewall':      'shape=mxgraph.cisco.firewalls.firewall;',
+  'badge-reader':  'shape=mxgraph.cisco.misc.generic_building;',
+  'server':        'shape=mxgraph.cisco.servers.standard_server;',
+  'vm':            'shape=mxgraph.cisco.servers.standard_server;',
+  'container':     'shape=mxgraph.cisco.servers.standard_server;',
+  'nas':           'shape=mxgraph.cisco.storage.tape_storage_library;',
+  'san':           'shape=mxgraph.cisco.storage.tape_storage_library;',
+  'cloud-storage': 'shape=mxgraph.cisco.misc.cloud;',
+  'cloud':         'shape=mxgraph.cisco.misc.cloud;',
+  'aws':           'shape=mxgraph.cisco.misc.cloud;',
+  'azure':         'shape=mxgraph.cisco.misc.cloud;',
+  'gcp':           'shape=mxgraph.cisco.misc.cloud;',
+  'isp':           'shape=mxgraph.cisco.misc.cloud;',
+  'workstation':   'shape=mxgraph.cisco.computers_and_peripherals.pc;',
+  'laptop':        'shape=mxgraph.cisco.computers_and_peripherals.laptop;',
+  'tablet':        'shape=mxgraph.cisco.computers_and_peripherals.laptop;',
+  'phone':         'shape=mxgraph.cisco.computers_and_peripherals.ip_phone;',
+  'printer':       'shape=mxgraph.cisco.computers_and_peripherals.printer;',
+  'ups':           'shape=mxgraph.cisco.misc.generic_building;',
+  'pdu':           'shape=mxgraph.cisco.misc.generic_building;',
+  'rack':          'shape=mxgraph.cisco.misc.generic_building;',
+  'patch-panel':   'shape=mxgraph.cisco.misc.generic_building;',
+  'camera':        'shape=mxgraph.cisco.misc.generic_building;',
+  'nvr':           'shape=mxgraph.cisco.misc.generic_building;',
+  'iot':           'shape=mxgraph.cisco.misc.generic_building;',
+}
+
+const BASE_NODE_STYLE =
+  'sketch=0;html=1;pointerEvents=1;dashed=0;fillColor=#036897;strokeColor=#ffffff;strokeWidth=2;verticalLabelPosition=bottom;verticalAlign=top;align=center;outlineConnect=0;'
+const GROUP_STYLE =
+  'swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;collapsible=0;marginBottom=0;swimlaneHead=0;fillColor=none;'
+
+function esc(s: string): string {
+  return s
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+}
+
+export function exportToDrawio(nodes: Node[], edges: Edge[]): string {
+  const cells: string[] = [
+    '<mxCell id="0"/>',
+    '<mxCell id="1" parent="0"/>',
+  ]
+
+  for (const node of nodes) {
+    const w = typeof node.style?.width === 'number' ? node.style.width : (node.measured?.width ?? 120)
+    const h = typeof node.style?.height === 'number' ? node.style.height : (node.measured?.height ?? 120)
+    const x = node.position.x
+    const y = node.position.y
+    const parentId = node.parentId ?? '1'
+
+    if (node.type === 'group') {
+      const gd = node.data as GroupNodeData
+      cells.push(
+        `<mxCell id="${esc(node.id)}" value="${esc(gd.label ?? '')}" style="${GROUP_STYLE}" vertex="1" parent="${esc(parentId)}">` +
+        `<mxGeometry x="${x}" y="${y}" width="${w}" height="${h}" as="geometry"/>` +
+        `</mxCell>`,
+      )
+    } else {
+      const dd = node.data as DeviceNodeData
+      const slug = dd.deviceType ?? 'server'
+      const shapeStyle = SLUG_TO_DRAWIO_STYLE[slug] ?? 'rounded=1;whiteSpace=wrap;html=1;'
+      cells.push(
+        `<mxCell id="${esc(node.id)}" value="${esc(dd.label ?? '')}" style="${shapeStyle}${BASE_NODE_STYLE}" vertex="1" parent="${esc(parentId)}">` +
+        `<mxGeometry x="${x}" y="${y}" width="${w}" height="${h}" as="geometry"/>` +
+        `</mxCell>`,
+      )
+    }
+  }
+
+  for (const edge of edges) {
+    const label = typeof edge.label === 'string' ? edge.label : ''
+    cells.push(
+      `<mxCell id="${esc(edge.id)}" value="${esc(label)}" style="edgeStyle=orthogonalEdgeStyle;html=1;" edge="1" source="${esc(edge.source)}" target="${esc(edge.target)}" parent="1">` +
+      `<mxGeometry relative="1" as="geometry"/>` +
+      `</mxCell>`,
+    )
+  }
+
+  const xml =
+    `<?xml version="1.0" encoding="UTF-8"?>\n` +
+    `<mxGraphModel><root>\n` +
+    cells.join('\n') +
+    `\n</root></mxGraphModel>`
+
+  return xml
+}
diff --git a/frontend/src/pages/NetworkDiagrams/DiagramEditor.tsx b/frontend/src/pages/NetworkDiagrams/DiagramEditor.tsx
index 0d000f98..abe302f8 100644
--- a/frontend/src/pages/NetworkDiagrams/DiagramEditor.tsx
+++ b/frontend/src/pages/NetworkDiagrams/DiagramEditor.tsx
@@ -25,6 +25,7 @@ import { AIAssistPanel } from '@/components/network/panels/AIAssistPanel'
 import { CanvasEmptyPrompt } from '@/components/network/CanvasEmptyPrompt'
 import { networkDiagramsApi, deviceTypesApi } from '@/api'
 import { toast } from '@/lib/toast'
+import { exportToDrawio } from '@/lib/drawio-export'
 import type { DeviceTypeResponse, DeviceProperties, AIGenerateResponse, DiagramEdge, DiagramNode } from '@/types'
 import type { DeviceNodeData } from '@/components/network/nodes/DeviceNode'
 
@@ -729,6 +730,21 @@ function DiagramEditorInner() {
     }
   }, [diagramId, name])
 
+  const handleExportDrawio = useCallback(() => {
+    if (nodes.length === 0) {
+      toast.warning('Add some devices to the diagram before exporting')
+      return
+    }
+    const xml = exportToDrawio(getNodes(), edges)
+    const blob = new Blob([xml], { type: 'application/xml' })
+    const url = URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = `${name.replace(/[^a-zA-Z0-9-_ ]/g, '') || 'diagram'}.drawio`
+    a.click()
+    URL.revokeObjectURL(url)
+  }, [nodes, edges, getNodes, name])
+
   if (loading) {
     return (
       <div className="flex h-full items-center justify-center">
@@ -752,6 +768,7 @@ function DiagramEditorInner() {
         onExportSvg={handleExportSvg}
         onExportPdf={handleExportPdf}
         onExportJson={handleExportJson}
+        onExportDrawio={handleExportDrawio}
         onUndo={undo}
         onRedo={redo}
         canUndo={canUndo}