diff --git a/frontend/search.html b/frontend/search.html
index d5a178c..c7c7006 100644
--- a/frontend/search.html
+++ b/frontend/search.html
@@ -8,6 +8,9 @@
     <script src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js" defer></script>
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css">
     
+    <!-- PDF.js 라이브러리 -->
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
+    
     <style>
         [x-cloak] { display: none !important; }
         
@@ -456,7 +459,7 @@
             
             <!-- 모달 내용 -->
             <div class="p-6 overflow-y-auto max-h-[60vh]">
-                <!-- PDF 미리보기 -->
+                <!-- PDF 미리보기 (데본씽크 스타일) -->
                 <div x-show="previewResult?.type === 'document_content' && previewResult?.highlight_info?.has_pdf" 
                      class="mb-4">
                     <div class="flex items-center justify-between mb-3">
@@ -464,26 +467,172 @@
                             <i class="fas fa-file-pdf mr-2 text-red-600"></i>PDF 미리보기
                         </div>
                         <div class="flex items-center space-x-2">
+                            <button @click="zoomOut()" 
+                                    class="px-2 py-1 bg-gray-600 text-white rounded text-xs hover:bg-gray-700">
+                                <i class="fas fa-search-minus"></i>
+                            </button>
+                            <span class="text-xs text-gray-600" x-text="`${Math.round(pdfZoom * 100)}%`"></span>
+                            <button @click="zoomIn()" 
+                                    class="px-2 py-1 bg-gray-600 text-white rounded text-xs hover:bg-gray-700">
+                                <i class="fas fa-search-plus"></i>
+                            </button>
                             <button @click="searchInPdf()" 
                                     class="px-3 py-1 bg-blue-600 text-white rounded text-xs hover:bg-blue-700">
                                 <i class="fas fa-search mr-1"></i>PDF에서 검색
                             </button>
                         </div>
                     </div>
-                    <div class="border rounded-lg overflow-hidden bg-gray-100" style="height: 400px;">
-                        <iframe :src="`/api/documents/${previewResult?.document_id}/pdf`" 
-                                class="w-full h-full"
-                                x-show="!pdfError"
-                                @error="pdfError = true">
+                    
+                    <!-- PDF 뷰어 컨테이너 -->
+                    <div class="border rounded-lg overflow-hidden bg-gray-100 relative" style="height: 500px;">
+                        <!-- PDF.js 뷰어 -->
+                        <div id="pdfViewerContainer" class="w-full h-full overflow-auto bg-gray-200">
+                            <div x-show="pdfLoading" class="flex items-center justify-center h-full">
+                                <div class="text-center">
+                                    <i class="fas fa-spinner fa-spin text-2xl text-gray-500 mb-2"></i>
+                                    <p class="text-gray-600">PDF를 로드하는 중...</p>
+                                </div>
+                            </div>
+                            
+                            <canvas id="pdfCanvas" 
+                                    x-show="!pdfLoading && !pdfError"
+                                    class="mx-auto shadow-lg"
+                                    style="display: block; margin: 20px auto;"></canvas>
+                            
+                            <div x-show="pdfError" class="flex items-center justify-center h-full text-gray-500">
+                                <div class="text-center">
+                                    <i class="fas fa-exclamation-triangle text-2xl mb-2"></i>
+                                    <p>PDF를 로드할 수 없습니다</p>
+                                    <button @click="openResult(previewResult)" 
+                                            class="mt-2 px-3 py-1 bg-blue-600 text-white rounded text-sm">
+                                        뷰어에서 열기
+                                    </button>
+                                </div>
+                            </div>
+                        </div>
+                        
+                        <!-- 페이지 네비게이션 -->
+                        <div x-show="!pdfLoading && !pdfError && pdfTotalPages > 1" 
+                             class="absolute bottom-4 left-1/2 transform -translate-x-1/2 bg-black bg-opacity-75 text-white px-4 py-2 rounded-lg flex items-center space-x-3">
+                            <button @click="prevPage()" 
+                                    :disabled="pdfCurrentPage <= 1"
+                                    class="px-2 py-1 bg-gray-600 rounded text-xs hover:bg-gray-500 disabled:opacity-50 disabled:cursor-not-allowed">
+                                <i class="fas fa-chevron-left"></i>
+                            </button>
+                            <span class="text-sm">
+                                <input type="number" 
+                                       x-model="pdfCurrentPage" 
+                                       @change="goToPage(pdfCurrentPage)"
+                                       :min="1" 
+                                       :max="pdfTotalPages"
+                                       class="w-12 text-center bg-transparent border-b border-gray-400 text-white text-xs">
+                                / <span x-text="pdfTotalPages"></span>
+                            </span>
+                            <button @click="nextPage()" 
+                                    :disabled="pdfCurrentPage >= pdfTotalPages"
+                                    class="px-2 py-1 bg-gray-600 rounded text-xs hover:bg-gray-500 disabled:opacity-50 disabled:cursor-not-allowed">
+                                <i class="fas fa-chevron-right"></i>
+                            </button>
+                        </div>
+                    </div>
+                </div>
+                
+                <!-- HTML 문서 미리보기 -->
+                <div x-show="(previewResult?.type === 'document' || previewResult?.type === 'document_content') && !previewResult?.highlight_info?.has_pdf" 
+                     class="mb-4">
+                    <div class="flex items-center justify-between mb-3">
+                        <div class="text-sm font-medium text-gray-800">
+                            <i class="fas fa-code mr-2 text-green-600"></i>HTML 문서 미리보기
+                        </div>
+                        <div class="flex items-center space-x-2">
+                            <button @click="toggleHtmlRaw()" 
+                                    class="px-3 py-1 bg-gray-600 text-white rounded text-xs hover:bg-gray-700">
+                                <i class="fas fa-code mr-1"></i><span x-text="htmlRawMode ? '렌더링' : '소스'"></span>
+                            </button>
+                        </div>
+                    </div>
+                    
+                    <div class="border rounded-lg overflow-hidden bg-white relative" style="height: 500px;">
+                        <!-- HTML 렌더링 뷰 -->
+                        <iframe id="htmlPreviewFrame" 
+                                x-show="!htmlRawMode && !htmlLoading"
+                                class="w-full h-full border-0"
+                                sandbox="allow-same-origin">
                         </iframe>
-                        <div x-show="pdfError" class="flex items-center justify-center h-full text-gray-500">
+                        
+                        <!-- HTML 소스 뷰 -->
+                        <div x-show="htmlRawMode && !htmlLoading" 
+                             class="w-full h-full overflow-auto p-4 bg-gray-900 text-green-400 font-mono text-sm">
+                            <pre x-html="htmlSourceCode"></pre>
+                        </div>
+                        
+                        <!-- 로딩 상태 -->
+                        <div x-show="htmlLoading" class="flex items-center justify-center h-full">
                             <div class="text-center">
-                                <i class="fas fa-exclamation-triangle text-2xl mb-2"></i>
-                                <p>PDF를 로드할 수 없습니다</p>
-                                <button @click="openResult(previewResult)" 
-                                        class="mt-2 px-3 py-1 bg-blue-600 text-white rounded text-sm">
-                                    뷰어에서 열기
-                                </button>
+                                <i class="fas fa-spinner fa-spin text-2xl text-gray-500 mb-2"></i>
+                                <p class="text-gray-600">HTML을 로드하는 중...</p>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                
+                <!-- 메모 트리 노드 미리보기 -->
+                <div x-show="previewResult?.type === 'memo'" 
+                     class="mb-4">
+                    <div class="flex items-center justify-between mb-3">
+                        <div class="text-sm font-medium text-gray-800">
+                            <i class="fas fa-tree mr-2 text-purple-600"></i>메모 노드 미리보기
+                        </div>
+                        <div class="flex items-center space-x-2">
+                            <span class="text-xs text-gray-600" x-text="previewResult?.document_title"></span>
+                        </div>
+                    </div>
+                    
+                    <div class="border rounded-lg overflow-hidden bg-white" style="height: 400px;">
+                        <div class="h-full overflow-auto p-6">
+                            <!-- 메모 제목 -->
+                            <h3 class="text-xl font-bold text-gray-900 mb-4" x-text="previewResult?.title"></h3>
+                            
+                            <!-- 메모 내용 -->
+                            <div class="prose max-w-none">
+                                <div class="text-gray-700 leading-relaxed whitespace-pre-wrap" 
+                                     x-html="highlightText(previewResult?.content || '', searchQuery)"></div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                
+                <!-- 노트 문서 미리보기 -->
+                <div x-show="previewResult?.type === 'note'" 
+                     class="mb-4">
+                    <div class="flex items-center justify-between mb-3">
+                        <div class="text-sm font-medium text-gray-800">
+                            <i class="fas fa-sticky-note mr-2 text-blue-600"></i>노트 미리보기
+                        </div>
+                        <div class="flex items-center space-x-2">
+                            <button @click="toggleNoteEdit()" 
+                                    class="px-3 py-1 bg-blue-600 text-white rounded text-xs hover:bg-blue-700">
+                                <i class="fas fa-edit mr-1"></i>편집기에서 열기
+                            </button>
+                        </div>
+                    </div>
+                    
+                    <div class="border rounded-lg overflow-hidden bg-white" style="height: 450px;">
+                        <div class="h-full overflow-auto">
+                            <!-- 노트 헤더 -->
+                            <div class="p-4 border-b bg-gray-50">
+                                <h3 class="text-lg font-semibold text-gray-900" x-text="previewResult?.title"></h3>
+                                <div class="text-sm text-gray-600 mt-1">
+                                    <span x-text="formatDate(previewResult?.created_at)"></span>
+                                </div>
+                            </div>
+                            
+                            <!-- 노트 내용 -->
+                            <div class="p-6">
+                                <div class="prose max-w-none">
+                                    <div class="text-gray-700 leading-relaxed" 
+                                         x-html="highlightText(previewResult?.content || '', searchQuery)"></div>
+                                </div>
                             </div>
                         </div>
                     </div>
diff --git a/frontend/static/js/search.js b/frontend/static/js/search.js
index 00b931d..d37dd46 100644
--- a/frontend/static/js/search.js
+++ b/frontend/static/js/search.js
@@ -26,6 +26,18 @@ window.searchApp = function() {
         previewLoading: false,
         pdfError: false,
         
+        // PDF 뷰어 상태
+        pdfLoading: false,
+        pdfDoc: null,
+        pdfCurrentPage: 1,
+        pdfTotalPages: 0,
+        pdfZoom: 1.0,
+        
+        // HTML 뷰어 상태
+        htmlLoading: false,
+        htmlRawMode: false,
+        htmlSourceCode: '',
+        
         // 인증 상태
         isAuthenticated: false,
         currentUser: null,
@@ -194,9 +206,27 @@ window.searchApp = function() {
             this.previewLoading = true;
             
             try {
-                // 추가 내용 로드 (필요한 경우)
-                if (result.type === 'document' || result.type === 'note') {
-                    // 전체 내용 로드
+                // 타입별 미리보기 로드
+                if (result.type === 'document_content' && result.highlight_info?.has_pdf) {
+                    // PDF 미리보기
+                    await this.loadPdfPreview(result.document_id);
+                } else if ((result.type === 'document' || result.type === 'document_content') && !result.highlight_info?.has_pdf) {
+                    // HTML 문서 미리보기
+                    await this.loadHtmlPreview(result.document_id);
+                } else if (result.type === 'note') {
+                    // 노트 미리보기 - 전체 내용 로드
+                    const fullContent = await this.loadFullContent(result);
+                    if (fullContent) {
+                        this.previewResult = { ...result, content: fullContent };
+                    }
+                } else if (result.type === 'memo') {
+                    // 메모 미리보기 - 전체 내용 로드
+                    const fullContent = await this.loadFullContent(result);
+                    if (fullContent) {
+                        this.previewResult = { ...result, content: fullContent };
+                    }
+                } else {
+                    // 기타 타입 - 기본 내용 로드
                     const fullContent = await this.loadFullContent(result);
                     if (fullContent) {
                         this.previewResult = { ...result, content: fullContent };
@@ -283,6 +313,229 @@ window.searchApp = function() {
             this.previewResult = null;
             this.previewLoading = false;
             this.pdfError = false;
+            
+            // PDF 리소스 정리
+            this.pdfDoc = null;
+            this.pdfCurrentPage = 1;
+            this.pdfTotalPages = 0;
+            this.pdfZoom = 1.0;
+            this.pdfLoading = false;
+            
+            // HTML 리소스 정리
+            this.htmlLoading = false;
+            this.htmlRawMode = false;
+            this.htmlSourceCode = '';
+        },
+
+        // PDF 미리보기 로드
+        async loadPdfPreview(documentId) {
+            this.pdfLoading = true;
+            this.pdfError = false;
+            
+            try {
+                // PDF.js 워커 설정
+                if (typeof pdfjsLib !== 'undefined') {
+                    pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
+                }
+                
+                const pdfUrl = `/api/documents/${documentId}/pdf`;
+                
+                // PDF 문서 로드
+                const loadingTask = pdfjsLib.getDocument({
+                    url: pdfUrl,
+                    httpHeaders: {
+                        'Authorization': `Bearer ${localStorage.getItem('token')}`
+                    }
+                });
+                
+                this.pdfDoc = await loadingTask.promise;
+                this.pdfTotalPages = this.pdfDoc.numPages;
+                this.pdfCurrentPage = 1;
+                
+                console.log('PDF 로드 완료:', this.pdfTotalPages, '페이지');
+                
+                // 첫 페이지 렌더링
+                await this.renderPdfPage(1);
+                
+            } catch (error) {
+                console.error('PDF 로드 실패:', error);
+                this.pdfError = true;
+            } finally {
+                this.pdfLoading = false;
+            }
+        },
+
+        // PDF 페이지 렌더링
+        async renderPdfPage(pageNum) {
+            if (!this.pdfDoc) return;
+            
+            try {
+                const page = await this.pdfDoc.getPage(pageNum);
+                const canvas = document.getElementById('pdfCanvas');
+                const context = canvas.getContext('2d');
+                
+                // 뷰포트 설정 (줌 적용)
+                const viewport = page.getViewport({ scale: this.pdfZoom });
+                
+                // 캔버스 크기 설정
+                canvas.height = viewport.height;
+                canvas.width = viewport.width;
+                
+                // 고해상도 디스플레이 지원
+                const devicePixelRatio = window.devicePixelRatio || 1;
+                canvas.style.width = viewport.width + 'px';
+                canvas.style.height = viewport.height + 'px';
+                canvas.width = viewport.width * devicePixelRatio;
+                canvas.height = viewport.height * devicePixelRatio;
+                context.scale(devicePixelRatio, devicePixelRatio);
+                
+                // 페이지 렌더링
+                const renderContext = {
+                    canvasContext: context,
+                    viewport: viewport
+                };
+                
+                await page.render(renderContext).promise;
+                console.log('페이지 렌더링 완료:', pageNum);
+                
+            } catch (error) {
+                console.error('페이지 렌더링 실패:', error);
+                this.pdfError = true;
+            }
+        },
+
+        // 줌 인
+        async zoomIn() {
+            if (this.pdfZoom < 3.0) {
+                this.pdfZoom += 0.25;
+                await this.renderPdfPage(this.pdfCurrentPage);
+            }
+        },
+
+        // 줌 아웃
+        async zoomOut() {
+            if (this.pdfZoom > 0.5) {
+                this.pdfZoom -= 0.25;
+                await this.renderPdfPage(this.pdfCurrentPage);
+            }
+        },
+
+        // 이전 페이지
+        async prevPage() {
+            if (this.pdfCurrentPage > 1) {
+                this.pdfCurrentPage--;
+                await this.renderPdfPage(this.pdfCurrentPage);
+            }
+        },
+
+        // 다음 페이지
+        async nextPage() {
+            if (this.pdfCurrentPage < this.pdfTotalPages) {
+                this.pdfCurrentPage++;
+                await this.renderPdfPage(this.pdfCurrentPage);
+            }
+        },
+
+        // 특정 페이지로 이동
+        async goToPage(pageNum) {
+            const page = parseInt(pageNum);
+            if (page >= 1 && page <= this.pdfTotalPages) {
+                this.pdfCurrentPage = page;
+                await this.renderPdfPage(this.pdfCurrentPage);
+            }
+        },
+
+        // HTML 미리보기 로드
+        async loadHtmlPreview(documentId) {
+            this.htmlLoading = true;
+            
+            try {
+                // HTML 내용 가져오기
+                const response = await fetch(`/api/documents/${documentId}/content`, {
+                    headers: {
+                        'Authorization': `Bearer ${localStorage.getItem('token')}`
+                    }
+                });
+                
+                if (response.ok) {
+                    const htmlContent = await response.text();
+                    this.htmlSourceCode = this.escapeHtml(htmlContent);
+                    
+                    // iframe에 HTML 로드
+                    const iframe = document.getElementById('htmlPreviewFrame');
+                    if (iframe) {
+                        const doc = iframe.contentDocument || iframe.contentWindow.document;
+                        doc.open();
+                        doc.write(htmlContent);
+                        doc.close();
+                        
+                        // 검색어 하이라이트 (iframe 내부)
+                        if (this.searchQuery) {
+                            this.highlightInIframe(iframe, this.searchQuery);
+                        }
+                    }
+                } else {
+                    throw new Error('HTML 로드 실패');
+                }
+            } catch (error) {
+                console.error('HTML 미리보기 로드 실패:', error);
+            } finally {
+                this.htmlLoading = false;
+            }
+        },
+
+        // HTML 소스/렌더링 모드 토글
+        toggleHtmlRaw() {
+            this.htmlRawMode = !this.htmlRawMode;
+        },
+
+        // iframe 내부 검색어 하이라이트
+        highlightInIframe(iframe, query) {
+            try {
+                const doc = iframe.contentDocument || iframe.contentWindow.document;
+                const walker = doc.createTreeWalker(
+                    doc.body,
+                    NodeFilter.SHOW_TEXT,
+                    null,
+                    false
+                );
+                
+                const textNodes = [];
+                let node;
+                while (node = walker.nextNode()) {
+                    if (node.textContent.toLowerCase().includes(query.toLowerCase())) {
+                        textNodes.push(node);
+                    }
+                }
+                
+                textNodes.forEach(textNode => {
+                    const parent = textNode.parentNode;
+                    const text = textNode.textContent;
+                    const regex = new RegExp(`(${this.escapeRegExp(query)})`, 'gi');
+                    const highlightedHTML = text.replace(regex, '<mark style="background: yellow; color: black;">$1</mark>');
+                    
+                    const wrapper = doc.createElement('span');
+                    wrapper.innerHTML = highlightedHTML;
+                    parent.replaceChild(wrapper, textNode);
+                });
+            } catch (error) {
+                console.error('iframe 하이라이트 실패:', error);
+            }
+        },
+
+        // HTML 이스케이프
+        escapeHtml(text) {
+            const div = document.createElement('div');
+            div.textContent = text;
+            return div.innerHTML;
+        },
+
+        // 노트 편집기에서 열기
+        toggleNoteEdit() {
+            if (this.previewResult && this.previewResult.type === 'note') {
+                const url = `/note-editor.html?id=${this.previewResult.id}`;
+                window.open(url, '_blank');
+            }
         },
 
         // PDF에서 검색