diff --git a/app/Http/Controllers/Api/V1/Documents/DocumentController.php b/app/Http/Controllers/Api/V1/Documents/DocumentController.php
index 729ed46..d63bdf9 100644
--- a/app/Http/Controllers/Api/V1/Documents/DocumentController.php
+++ b/app/Http/Controllers/Api/V1/Documents/DocumentController.php
@@ -74,6 +74,22 @@ public function destroy(int $id): JsonResponse
         }, __('message.deleted'));
     }
 
+    /**
+     * rendered_html 스냅샷 저장 (Lazy Snapshot)
+     * PATCH /v1/documents/{id}/snapshot
+     */
+    public function patchSnapshot(int $id, UpdateRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            $renderedHtml = $request->validated()['rendered_html'] ?? null;
+            if (! $renderedHtml) {
+                throw new \Symfony\Component\HttpKernel\Exception\BadRequestHttpException('rendered_html is required');
+            }
+
+            return $this->service->patchSnapshot($id, $renderedHtml);
+        }, __('message.updated'));
+    }
+
     // =========================================================================
     // FQC 일괄생성 (제품검사)
     // =========================================================================
diff --git a/app/Services/DocumentService.php b/app/Services/DocumentService.php
index 2fef635..82783b6 100644
--- a/app/Services/DocumentService.php
+++ b/app/Services/DocumentService.php
@@ -718,6 +718,28 @@ public function fqcStatus(int $orderId, int $templateId): array
         ];
     }
 
+    // =========================================================================
+    // Snapshot (Lazy Snapshot)
+    // =========================================================================
+
+    /**
+     * rendered_html만 업데이트 (상태 무관, canEdit 체크 없음)
+     * Lazy Snapshot: 조회 시 rendered_html이 없으면 프론트에서 캡처 후 저장
+     */
+    public function patchSnapshot(int $id, string $renderedHtml): Document
+    {
+        $tenantId = $this->tenantId();
+
+        $document = Document::query()
+            ->where('tenant_id', $tenantId)
+            ->findOrFail($id);
+
+        $document->rendered_html = $renderedHtml;
+        $document->save();
+
+        return $document;
+    }
+
     // =========================================================================
     // Resolve/Upsert (React 연동용)
     // =========================================================================
diff --git a/app/Services/WorkOrderService.php b/app/Services/WorkOrderService.php
index ee5d342..ba39c09 100644
--- a/app/Services/WorkOrderService.php
+++ b/app/Services/WorkOrderService.php
@@ -2431,11 +2431,26 @@ public function resolveInspectionDocument(int $workOrderId, array $params = []):
             ->latest()
             ->first();
 
+        // Lazy Snapshot 대상: rendered_html이 없는 문서 (상태 무관)
+        $snapshotDocumentId = null;
+        $snapshotCandidate = Document::query()
+            ->where('tenant_id', $tenantId)
+            ->where('template_id', $templateId)
+            ->where('linkable_type', 'work_order')
+            ->where('linkable_id', $workOrderId)
+            ->whereNull('rendered_html')
+            ->latest()
+            ->value('id');
+        if ($snapshotCandidate) {
+            $snapshotDocumentId = $snapshotCandidate;
+        }
+
         return [
             'work_order_id' => $workOrderId,
             'template_id' => $templateId,
             'template' => $formattedTemplate,
             'existing_document' => $existingDocument,
+            'snapshot_document_id' => $snapshotDocumentId,
             'work_order_info' => $this->buildWorkOrderInfo($workOrder),
         ];
     }
diff --git a/routes/api/v1/documents.php b/routes/api/v1/documents.php
index ae56c70..2044ab4 100644
--- a/routes/api/v1/documents.php
+++ b/routes/api/v1/documents.php
@@ -33,6 +33,7 @@
     Route::get('/{id}', [DocumentController::class, 'show'])->whereNumber('id')->name('v1.documents.show');
     Route::post('/', [DocumentController::class, 'store'])->name('v1.documents.store');
     Route::patch('/{id}', [DocumentController::class, 'update'])->whereNumber('id')->name('v1.documents.update');
+    Route::patch('/{id}/snapshot', [DocumentController::class, 'patchSnapshot'])->whereNumber('id')->name('v1.documents.snapshot');
     Route::delete('/{id}', [DocumentController::class, 'destroy'])->whereNumber('id')->name('v1.documents.destroy');
 
     // 결재 워크플로우