diff --git a/frontend/src/api/client.js b/frontend/src/api/client.js
index 80598e1..b71bae7 100644
--- a/frontend/src/api/client.js
+++ b/frontend/src/api/client.js
@@ -328,11 +328,19 @@ export function moveDocument(docId, folderId) {
 
 // ── Shares ────────────────────────────────────────────────────────────────────
 
-export function createShare(docId, recipientHandle) {
+export function createShare(docId, recipientHandle, permission = 'view') {
   return request('/api/shares', {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ document_id: docId, recipient_handle: recipientHandle }),
+    body: JSON.stringify({ document_id: docId, recipient_handle: recipientHandle, permission }),
+  })
+}
+
+export function updateSharePermission(shareId, permission) {
+  return request(`/api/shares/${shareId}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ permission }),
   })
 }
 
diff --git a/frontend/src/components/documents/DocumentCard.vue b/frontend/src/components/documents/DocumentCard.vue
index 9679789..08a9ba8 100644
--- a/frontend/src/components/documents/DocumentCard.vue
+++ b/frontend/src/components/documents/DocumentCard.vue
@@ -28,7 +28,7 @@
         </div>
 
         <!-- Shared indicator pill -->
-        <div v-if="doc.share_count > 0" class="mt-2">
+        <div v-if="doc.is_shared" class="mt-2">
           <span class="bg-indigo-50 text-indigo-600 text-xs font-medium px-2 py-1 rounded-full">Shared</span>
         </div>
       </div>
diff --git a/frontend/src/components/sharing/ShareModal.vue b/frontend/src/components/sharing/ShareModal.vue
index 099404f..8a369bc 100644
--- a/frontend/src/components/sharing/ShareModal.vue
+++ b/frontend/src/components/sharing/ShareModal.vue
@@ -36,6 +36,14 @@
           class="flex-1 border border-gray-300 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-indigo-500"
           @keydown.enter="submitShare"
         />
+        <select
+          v-model="permission"
+          aria-label="Permission level"
+          class="border border-gray-300 rounded-lg px-3 py-2 text-sm bg-white focus:outline-none focus:ring-2 focus:ring-indigo-500 shrink-0"
+        >
+          <option value="view">Can view</option>
+          <option value="edit">Can edit</option>
+        </select>
         <button
           @click="submitShare"
           :disabled="submitting || !handle.trim()"
@@ -51,6 +59,7 @@
 
       <!-- Error -->
       <p v-if="error" class="text-xs text-red-600 mt-2">{{ error }}</p>
+      <p v-if="permissionError" class="text-xs text-red-600 mt-2">{{ permissionError }}</p>
 
       <!-- Separator -->
       <div class="border-t border-gray-100 my-4"></div>
@@ -72,7 +81,24 @@
         >
           <div class="flex items-center gap-2">
             <span class="text-sm text-gray-900">{{ share.recipient_handle }}</span>
-            <span class="text-xs bg-gray-100 text-gray-600 px-2 py-1 rounded-full font-medium">view</span>
+            <div
+              role="group"
+              :aria-label="`Permission for ${share.recipient_handle}`"
+              class="flex"
+              :class="{ 'opacity-50 pointer-events-none': updatingPermission.has(share.id) }"
+            >
+              <button
+                v-for="level in ['view', 'edit']"
+                :key="level"
+                :aria-pressed="share.permission === level"
+                :aria-label="`Change permission for ${share.recipient_handle} to ${level}`"
+                class="text-xs px-2 py-1 rounded-full font-medium transition-colors first:rounded-r-none last:rounded-l-none"
+                :class="share.permission === level
+                  ? 'bg-indigo-50 text-indigo-600 font-medium'
+                  : 'bg-gray-100 text-gray-600'"
+                @click="share.permission !== level && handlePermissionChange(share.id, level)"
+              >{{ level === 'view' ? 'View' : 'Edit' }}</button>
+            </div>
           </div>
           <button
             @click="handleRevoke(share.id)"
@@ -102,10 +128,13 @@ const emit = defineEmits(['close'])
 const docsStore = useDocumentsStore()
 
 const handle = ref('')
+const permission = ref('view')
 const submitting = ref(false)
 const error = ref(null)
+const permissionError = ref(null)
 const shares = ref([])
 const loadingShares = ref(false)
+const updatingPermission = ref(new Set())
 
 onMounted(async () => {
   loadingShares.value = true
@@ -127,9 +156,10 @@ async function submitShare() {
   error.value = null
 
   try {
-    const newShare = await docsStore.shareDocument(props.doc.id, trimmed)
+    const newShare = await docsStore.shareDocument(props.doc.id, trimmed, permission.value)
     shares.value.push(newShare)
     handle.value = ''
+    permission.value = 'view'
   } catch (e) {
     if (e.status === 404) {
       error.value = 'User not found. Check the handle and try again.'
@@ -143,6 +173,25 @@ async function submitShare() {
   }
 }
 
+async function handlePermissionChange(shareId, newPermission) {
+  const share = shares.value.find(s => s.id === shareId)
+  if (!share) return
+  const oldPermission = share.permission
+  share.permission = newPermission
+  updatingPermission.value = new Set([...updatingPermission.value, shareId])
+  permissionError.value = null
+  try {
+    await docsStore.updateSharePermission(shareId, newPermission)
+  } catch (e) {
+    share.permission = oldPermission
+    permissionError.value = 'Failed to update permission.'
+  } finally {
+    const next = new Set(updatingPermission.value)
+    next.delete(shareId)
+    updatingPermission.value = next
+  }
+}
+
 async function handleRevoke(shareId) {
   // Optimistic removal
   const removedIdx = shares.value.findIndex(s => s.id === shareId)
diff --git a/frontend/src/stores/documents.js b/frontend/src/stores/documents.js
index abd32c3..16458d1 100644
--- a/frontend/src/stores/documents.js
+++ b/frontend/src/stores/documents.js
@@ -156,8 +156,8 @@ export const useDocumentsStore = defineStore('documents', () => {
     total.value = Math.max(0, total.value - 1)
   }
 
-  async function shareDocument(docId, recipientHandle) {
-    try { return await api.createShare(docId, recipientHandle) } catch (e) { throw e }
+  async function shareDocument(docId, recipientHandle, permission = 'view') {
+    try { return await api.createShare(docId, recipientHandle, permission) } catch (e) { throw e }
   }
 
   async function revokeShare(shareId) {
@@ -168,5 +168,9 @@ export const useDocumentsStore = defineStore('documents', () => {
     try { return await api.listShares(docId) } catch (e) { throw e }
   }
 
-  return { documents, total, loading, error, uploadProgress, currentFolderId, searchQuery, sortField, sortOrder, fetchDocuments, upload, remove, reclassify, moveToFolder, shareDocument, revokeShare, listShares }
+  async function updateSharePermission(shareId, permission) {
+    try { return await api.updateSharePermission(shareId, permission) } catch (e) { throw e }
+  }
+
+  return { documents, total, loading, error, uploadProgress, currentFolderId, searchQuery, sortField, sortOrder, fetchDocuments, upload, remove, reclassify, moveToFolder, shareDocument, revokeShare, listShares, updateSharePermission }
 })