diff --git a/common/src/app/common/geom/shapes/bounds.cljc b/common/src/app/common/geom/shapes/bounds.cljc
index 3da3a1eef8..95b215c686 100644
--- a/common/src/app/common/geom/shapes/bounds.cljc
+++ b/common/src/app/common/geom/shapes/bounds.cljc
@@ -89,14 +89,23 @@
   ([shape]
    (get-shape-filter-bounds shape false))
   ([shape ignore-shadow-margin?]
-   (if (or (and (cfh/svg-raw-shape? shape)
-                (not= :svg (dm/get-in shape [:content :tag])))
-           ;; If no shadows or blur, we return the selrect as is
-           (and (empty? (-> shape :shadow))
-                (or (nil? (:blur shape))
-                    (not= :layer-blur (-> shape :blur :type))
-                    (zero? (-> shape :blur :value (or 0))))))
+   (cond
+     ;; SVG raw elements (non-root) don't have proper rotated points; use selrect
+     (and (cfh/svg-raw-shape? shape)
+          (not= :svg (dm/get-in shape [:content :tag])))
      (dm/get-prop shape :selrect)
+
+     ;; No shadows or blur: use the axis-aligned bounding box from the actual
+     ;; (possibly rotated) points. Using selrect here would be wrong for rotated
+     ;; shapes because selrect stores the unrotated rectangle, not the screen-space bbox.
+     (and (empty? (-> shape :shadow))
+          (or (nil? (:blur shape))
+              (not= :layer-blur (-> shape :blur :type))
+              (zero? (-> shape :blur :value (or 0)))))
+     (-> (dm/get-prop shape :points)
+         (grc/points->rect))
+
+     :else
      (let [filters    (shape->filters shape)
            blur-value (case (-> shape :blur :type)
                         :layer-blur (or (-> shape :blur :value) 0)
diff --git a/frontend/playwright/data/viewer/get-file-fragment-rotated-board-stroke.json b/frontend/playwright/data/viewer/get-file-fragment-rotated-board-stroke.json
new file mode 100644
index 0000000000..af47e655bb
--- /dev/null
+++ b/frontend/playwright/data/viewer/get-file-fragment-rotated-board-stroke.json
@@ -0,0 +1,195 @@
+{
+    "~:id": "~uaa5cc0bb-91ff-81b9-8004-77dfae2d9e7c",
+    "~:file-id": "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb1",
+    "~:created-at": "~m1717759268004",
+    "~:data": {
+        "~:options": {},
+        "~:objects": {
+            "~u00000000-0000-0000-0000-000000000000": {
+                "~#shape": {
+                    "~:y": 0,
+                    "~:hide-fill-on-export": false,
+                    "~:transform": {
+                        "~#matrix": {
+                            "~:a": 1.0,
+                            "~:b": 0.0,
+                            "~:c": 0.0,
+                            "~:d": 1.0,
+                            "~:e": 0.0,
+                            "~:f": 0.0
+                        }
+                    },
+                    "~:rotation": 0,
+                    "~:name": "Root Frame",
+                    "~:width": 0.01,
+                    "~:type": "~:frame",
+                    "~:points": [
+                        {
+                            "~#point": {
+                                "~:x": 0,
+                                "~:y": 0
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 0.01,
+                                "~:y": 0
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 0.01,
+                                "~:y": 0.01
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 0,
+                                "~:y": 0.01
+                            }
+                        }
+                    ],
+                    "~:proportion-lock": false,
+                    "~:transform-inverse": {
+                        "~#matrix": {
+                            "~:a": 1.0,
+                            "~:b": 0.0,
+                            "~:c": 0.0,
+                            "~:d": 1.0,
+                            "~:e": 0.0,
+                            "~:f": 0.0
+                        }
+                    },
+                    "~:id": "~u00000000-0000-0000-0000-000000000000",
+                    "~:parent-id": "~u00000000-0000-0000-0000-000000000000",
+                    "~:frame-id": "~u00000000-0000-0000-0000-000000000000",
+                    "~:strokes": [],
+                    "~:x": 0,
+                    "~:proportion": 1.0,
+                    "~:selrect": {
+                        "~#rect": {
+                            "~:x": 0,
+                            "~:y": 0,
+                            "~:width": 0.01,
+                            "~:height": 0.01,
+                            "~:x1": 0,
+                            "~:y1": 0,
+                            "~:x2": 0.01,
+                            "~:y2": 0.01
+                        }
+                    },
+                    "~:fills": [
+                        {
+                            "~:fill-color": "#FFFFFF",
+                            "~:fill-opacity": 1
+                        }
+                    ],
+                    "~:flip-x": null,
+                    "~:height": 0.01,
+                    "~:flip-y": null,
+                    "~:shapes": [
+                        "~ubc508673-9e3b-80bf-8004-77dfa30a2b13"
+                    ]
+                }
+            },
+            "~ubc508673-9e3b-80bf-8004-77dfa30a2b13": {
+                "~#shape": {
+                    "~:y": 100,
+                    "~:hide-fill-on-export": false,
+                    "~:transform": {
+                        "~#matrix": {
+                            "~:a": 0.5735764363510460,
+                            "~:b": 0.8191520442889918,
+                            "~:c": -0.8191520442889918,
+                            "~:d": 0.5735764363510460,
+                            "~:e": 0.0,
+                            "~:f": 0.0
+                        }
+                    },
+                    "~:rotation": 55,
+                    "~:grow-type": "~:fixed",
+                    "~:hide-in-viewer": false,
+                    "~:name": "Board",
+                    "~:width": 80,
+                    "~:type": "~:frame",
+                    "~:points": [
+                        {
+                            "~#point": {
+                                "~:x": 166.208,
+                                "~:y": 92.816
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 212.096,
+                                "~:y": 158.352
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 113.792,
+                                "~:y": 227.184
+                            }
+                        },
+                        {
+                            "~#point": {
+                                "~:x": 67.904,
+                                "~:y": 161.648
+                            }
+                        }
+                    ],
+                    "~:proportion-lock": false,
+                    "~:transform-inverse": {
+                        "~#matrix": {
+                            "~:a": 0.5735764363510460,
+                            "~:b": -0.8191520442889918,
+                            "~:c": 0.8191520442889918,
+                            "~:d": 0.5735764363510460,
+                            "~:e": 0.0,
+                            "~:f": 0.0
+                        }
+                    },
+                    "~:id": "~ubc508673-9e3b-80bf-8004-77dfa30a2b13",
+                    "~:parent-id": "~u00000000-0000-0000-0000-000000000000",
+                    "~:frame-id": "~u00000000-0000-0000-0000-000000000000",
+                    "~:strokes": [
+                        {
+                            "~:stroke-color": "#FF0000",
+                            "~:stroke-opacity": 1,
+                            "~:stroke-style": "~:solid",
+                            "~:stroke-alignment": "~:outer",
+                            "~:stroke-width": 20
+                        }
+                    ],
+                    "~:x": 100,
+                    "~:proportion": 1,
+                    "~:selrect": {
+                        "~#rect": {
+                            "~:x": 100,
+                            "~:y": 100,
+                            "~:width": 80,
+                            "~:height": 120,
+                            "~:x1": 100,
+                            "~:y1": 100,
+                            "~:x2": 180,
+                            "~:y2": 220
+                        }
+                    },
+                    "~:fills": [
+                        {
+                            "~:fill-color": "#FFFFFF",
+                            "~:fill-opacity": 1
+                        }
+                    ],
+                    "~:flip-x": null,
+                    "~:height": 120,
+                    "~:flip-y": null,
+                    "~:shapes": [],
+                    "~:show-content": true
+                }
+            }
+        },
+        "~:id": "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb2",
+        "~:name": "Page 1"
+    }
+}
diff --git a/frontend/playwright/data/viewer/get-view-only-bundle-rotated-board-stroke.json b/frontend/playwright/data/viewer/get-view-only-bundle-rotated-board-stroke.json
new file mode 100644
index 0000000000..3bd07bf48a
--- /dev/null
+++ b/frontend/playwright/data/viewer/get-view-only-bundle-rotated-board-stroke.json
@@ -0,0 +1,86 @@
+{
+    "~:users": [
+        {
+            "~:id": "~u0515a066-e303-8169-8004-73eb4018f4e0",
+            "~:email": "leia@example.com",
+            "~:name": "Princesa Leia",
+            "~:fullname": "Princesa Leia",
+            "~:is-active": true
+        }
+    ],
+    "~:fonts": [],
+    "~:project": {
+        "~:id": "~u0515a066-e303-8169-8004-73eb401b5d55",
+        "~:name": "Drafts",
+        "~:team-id": "~u0515a066-e303-8169-8004-73eb401977a6"
+    },
+    "~:share-links": [],
+    "~:libraries": [],
+    "~:file": {
+        "~:features": {
+            "~#set": [
+                "layout/grid",
+                "styles/v2",
+                "fdata/pointer-map",
+                "fdata/objects-map",
+                "components/v2",
+                "fdata/shape-data-type"
+            ]
+        },
+        "~:has-media-trimmed": false,
+        "~:comment-thread-seqn": 0,
+        "~:name": "Rotated Board Stroke Test",
+        "~:revn": 1,
+        "~:modified-at": "~m1717759268010",
+        "~:id": "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb1",
+        "~:is-shared": false,
+        "~:version": 48,
+        "~:project-id": "~u0515a066-e303-8169-8004-73eb401b5d55",
+        "~:created-at": "~m1717759250257",
+        "~:data": {
+            "~:id": "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb1",
+            "~:options": {
+                "~:components-v2": true
+            },
+            "~:pages": [
+                "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb2"
+            ],
+            "~:pages-index": {
+                "~uaa5cc0bb-91ff-81b9-8004-77df9cd3edb2": {
+                    "~#penpot/pointer": [
+                        "~uaa5cc0bb-91ff-81b9-8004-77dfae2d9e7c",
+                        {
+                            "~:created-at": "~m1717759268024"
+                        }
+                    ]
+                }
+            }
+        }
+    },
+    "~:team": {
+        "~:id": "~u0515a066-e303-8169-8004-73eb401977a6",
+        "~:created-at": "~m1717493865581",
+        "~:modified-at": "~m1717493865581",
+        "~:name": "Default",
+        "~:is-default": true,
+        "~:features": {
+            "~#set": [
+                "layout/grid",
+                "styles/v2",
+                "fdata/pointer-map",
+                "fdata/objects-map",
+                "components/v2",
+                "fdata/shape-data-type"
+            ]
+        }
+    },
+    "~:permissions": {
+        "~:type": "~:membership",
+        "~:is-owner": true,
+        "~:is-admin": true,
+        "~:can-edit": true,
+        "~:can-read": true,
+        "~:is-logged": true,
+        "~:in-team": true
+    }
+}
diff --git a/frontend/playwright/ui/pages/ViewerPage.js b/frontend/playwright/ui/pages/ViewerPage.js
index 5aaf2e0c37..034b25e2f3 100644
--- a/frontend/playwright/ui/pages/ViewerPage.js
+++ b/frontend/playwright/ui/pages/ViewerPage.js
@@ -71,6 +71,21 @@ export class ViewerPage extends BaseWebSocketPage {
     );
   }
 
+  async setupFileWithRotatedBoardStroke() {
+    await this.mockRPC(
+      /get\-view\-only\-bundle\?/,
+      "viewer/get-view-only-bundle-rotated-board-stroke.json",
+    );
+    await this.mockRPC(
+      "get-comment-threads?file-id=*",
+      "workspace/get-comment-threads-empty.json",
+    );
+    await this.mockRPC(
+      "get-file-fragment?file-id=*&fragment-id=*",
+      "viewer/get-file-fragment-rotated-board-stroke.json",
+    );
+  }
+
   async setupFileWithComments() {
     await this.mockRPC(
       /get\-view\-only\-bundle\?/,
diff --git a/frontend/playwright/ui/specs/viewer-rotated-board-stroke.spec.js b/frontend/playwright/ui/specs/viewer-rotated-board-stroke.spec.js
new file mode 100644
index 0000000000..05fda576e8
--- /dev/null
+++ b/frontend/playwright/ui/specs/viewer-rotated-board-stroke.spec.js
@@ -0,0 +1,47 @@
+import { test, expect } from "@playwright/test";
+import { ViewerPage } from "../pages/ViewerPage";
+
+// Issue 8257: outer stroke of a rotated board is cropped in View Mode.
+// The SVG viewport must be large enough to contain the stroke of a rotated board.
+// A 55° rotated board (80×120) with a 20px outer stroke has a rotated bounding box
+// of ~144×134px. The viewport must be at least ~202×192px (bbox + stroke margin).
+
+test.beforeEach(async ({ page }) => {
+  await ViewerPage.init(page);
+});
+
+const rotatedBoardFileId = "aa5cc0bb-91ff-81b9-8004-77df9cd3edb1";
+const rotatedBoardPageId = "aa5cc0bb-91ff-81b9-8004-77df9cd3edb2";
+
+test("Viewer shows full outer stroke of a rotated board without clipping", async ({
+  page,
+}) => {
+  const viewer = new ViewerPage(page);
+  await viewer.setupLoggedInUser();
+  await viewer.setupFileWithRotatedBoardStroke();
+
+  await viewer.goToViewer({
+    fileId: rotatedBoardFileId,
+    pageId: rotatedBoardPageId,
+  });
+
+  // Wait for the viewer SVG to be rendered
+  const svg = page.locator("svg[class*='not-fixed']").first();
+  await expect(svg).toBeVisible();
+
+  // The SVG viewBox must be large enough to contain the rotated board plus its
+  // 20px outer stroke. For a 55° rotated board (80×120):
+  // - The axis-aligned bounding box of the rotated frame is ~144×134px
+  // - The outer stroke (20px) adds sqrt(2)*20 ≈ 29px margin on each side
+  // - So the viewport must be at least ~202×192px
+  //
+  // Before the fix, the viewer used the unrotated selrect (80×120) as the viewport,
+  // causing the stroke to be heavily clipped.
+  const viewBox = await svg.getAttribute("viewBox");
+  const [, , vbWidth, vbHeight] = viewBox.split(" ").map(Number);
+
+  // The unrotated selrect is 80×120. If the viewport is close to those dimensions,
+  // the stroke is being clipped (bug). The fixed viewport should be much larger.
+  expect(vbWidth).toBeGreaterThan(150);
+  expect(vbHeight).toBeGreaterThan(150);
+});
diff --git a/frontend/src/app/main/ui/viewer.cljs b/frontend/src/app/main/ui/viewer.cljs
index f86208a8b7..5867a7cc14 100644
--- a/frontend/src/app/main/ui/viewer.cljs
+++ b/frontend/src/app/main/ui/viewer.cljs
@@ -53,9 +53,9 @@
 
 (defn- calculate-size
   "Calculate the total size we must reserve for the frame, including possible paddings
-   added because shadows or blur."
+   added because shadows, blur, or strokes."
   [objects frame zoom]
-  (let [{:keys [x y width height]} (gsb/get-object-bounds objects frame)]
+  (let [{:keys [x y width height]} (gsb/get-object-bounds objects frame {:ignore-margin? false})]
     {:base-width  width
      :base-height height
      :x           x