圖片轉 PDF 教學：將多張 JPG/PNG 合併成一個 PDF
1. 導言
你有冇試過要將多張圖片（例如掃描文件、產品相、設計圖）合併成一個 PDF 檔案？無論係將多頁掃描文件整合、製作作品集，定係將多張相片打包傳送，將圖片轉換成 PDF 都係非常實用嘅功能。我哋嘅免費線上圖片轉 PDF 工具專為解決呢個問題而設：支援上傳多張 JPG/PNG/WebP 圖片、拖曳排序、選擇頁面大小，而且 100% 純前端運算，圖片唔會離開你嘅瀏覽器。
2. 背景與概念解釋
圖片轉 PDF（Images to PDF）係指將一張或多張圖片嵌入到 PDF 文件中，每張圖片成為一頁。呢個功能喺多個場景中非常有用：掃描文件（如合約、收據）通常以圖片格式儲存，將佢哋轉換成 PDF 可以方便歸檔同分享；設計師或攝影師可以將作品集圖片合併成一個 PDF 方便展示。
傳統做法通常需要將圖片插入 Word 再另存為 PDF，或者使用付費軟件。前者操作繁瑣，後者成本高。我哋嘅工具採用 PDF-lib 技術，所有轉換喺你嘅瀏覽器內完成，圖片由頭到尾都唔會離開你嘅裝置。
3. 實際應用場景
- 掃描文件整合：將多張掃描嘅合約、收據、證件圖片合併成一個 PDF，方便傳送同歸檔。
- 作品集製作：設計師、攝影師可將多張作品圖片合併成一個 PDF，方便向客戶展示。
- 報告與簡報：將多張圖表、截圖、產品相片整合成 PDF，方便插入報告或簡報。
4. 使用步驟
- 上傳圖片：點擊或拖曳上傳多張 JPG、PNG 或 WebP 圖片。
- 調整順序：點擊 ↑ / ↓ 按鈕調整圖片排列順序，確保頁面順序正確。
- 選擇頁面大小：選擇 A4、A5、Letter 或「自動適應圖片大小」。
- 轉換成 PDF：點擊「轉換成 PDF」按鈕，系統會自動生成合併後嘅 PDF。
- 下載檔案：轉換完成後點擊「下載 PDF」即可儲存檔案。
5. 與其他方法比較
| 比較項目 |
本站前端工具 |
Word 轉 PDF |
付費軟件 |
| 使用成本 |
完全免費 |
需有 Word |
昂貴 |
| 數據私隱 |
100% 本地處理 |
本地（但步驟繁瑣） |
視乎軟件 |
| 拖曳排序 |
✅ 支援 |
❌ 需手動 |
✅ 通常支援 |
| 頁面大小選擇 |
✅ A4/A5/Letter/自動 |
✅ 可自訂 |
✅ 可自訂 |
| 操作時間 |
數秒 |
數分鐘 |
數秒 |
6. 個人經驗與觀點
「之前要將 20 張產品相片整合成一個 PDF 俾客戶睇，如果用 Word 逐張插入再另存，搞嚟搞去至少要 10 分鐘。後來用咗呢個圖片轉 PDF 工具，將 20 張相一次過拖入去，再調整一下順序，揀 A4 尺寸，10 秒就出到一個整齊嘅 PDF。對於成日要處理產品相、作品集嘅人嚟講，呢個工具真係幫到手。」
7. 總結與試用呼籲 (CTA)
Free Images to PDF Guide: Merge Multiple JPG/PNG Images into One PDF
1. Introduction
Have you ever needed to combine multiple images (scanned documents, product photos, designs) into a single PDF file? Whether consolidating multi-page scans, creating a portfolio, or packaging multiple photos for sending, converting images to PDF is a highly practical function. Our free online Images to PDF tool solves this problem: supports uploading multiple JPG/PNG/WebP images, drag-to-sort, page size selection, and 100% client-side processing—your images never leave your browser.
2. Background & Technical Concept
Images to PDF conversion involves embedding one or more images into a PDF document, with each image becoming a separate page. This is useful in many scenarios: scanned documents (contracts, receipts) are often stored as images, and converting them to PDF makes archiving and sharing easier; designers and photographers can combine portfolio images into a single PDF for client presentation.
Traditional methods often involve inserting images into Word and saving as PDF, or using paid software—the former is cumbersome, the latter expensive. Our tool leverages PDF-lib technology—all conversion happens locally in your browser, and your images never leave your device.
3. Real-World Application Scenarios
- Document Scanning Integration: Combine multiple scanned contracts, receipts, and ID images into one PDF for easy sharing and archiving.
- Portfolio Creation: Designers and photographers can merge multiple artwork images into a single PDF for client presentations.
- Report & Presentation Prep: Integrate charts, screenshots, and product photos into a PDF for easy insertion into reports or presentations.
4. Step-by-Step Usage Guide
- Upload Images: Click or drag-and-drop multiple JPG, PNG, or WebP images.
- Adjust Order: Use the ↑ / ↓ buttons to reorder images for the correct page sequence.
- Select Page Size: Choose A4, A5, Letter, or "Auto-fit to image size."
- Convert to PDF: Click "Convert to PDF"—the system generates the merged PDF automatically.
- Download File: Click "Download PDF" to save the final file.
5. Comparison with Alternative Solutions
| Feature |
Client-Side Tool (Us) |
Word to PDF |
Paid Software |
| Cost |
100% Free |
Requires Word |
Expensive |
| Privacy |
100% Local Processing |
Local (but complicated) |
Depends on Software |
| Drag & Drop Sorting |
✅ Supported |
❌ Manual |
✅ Usually |
| Page Size Selection |
✅ A4/A5/Letter/Auto |
✅ Customizable |
✅ Customizable |
| Time to Complete |
Seconds |
Minutes |
Seconds |
6. Personal Insights & Expert Advice
"I once needed to combine 20 product photos into a single PDF for a client. Using Word to insert each image and save as PDF would have taken at least 10 minutes. Then I used this Images to PDF tool—dragged in all 20 photos, adjusted the order, selected A4 size, and 10 seconds later I had a polished PDF. For anyone who regularly handles product photos or portfolios, this tool is a lifesaver."
7. Conclusion & CTA