PDF 工具
在瀏覽器中直接合併、分割和壓縮 PDF！
選擇 PDF 檔案
將 PDF 檔案拖放到此處或點擊選擇
每個檔案最大 50MB
PDF 工具是什麼？
The PDF Tools suite lets you merge, split, compress, and convert PDF files directly in your browser. PDFs remain the universal standard for document sharing across business, legal, academic, and government contexts — handling them efficiently is an everyday need. Traditional PDF editing requires expensive desktop software or uploading sensitive documents to third-party servers. This tool eliminates both problems by processing everything locally in your browser using modern web technologies. Your documents never leave your device. Merge multiple PDFs into one, extract specific pages, compress large files for email, or convert between PDF and image formats — all free, fast, and private. No watermarks, no file size limits, and no account required.
- ✓ 支援合併、分割、壓縮、旋轉及 PDF 轉圖片
- ✓ 在瀏覽器內完成所有處理，檔案不上傳至伺服器
- ✓ 無需安裝，在任何現代瀏覽器中即可立即使用
- ✓ Complete privacy — all processing happens locally, files never leave your device
- ✓ No watermarks, no file size limits, and no account required
常見問題
▶使用安全嗎？
安全！所有處理完全在你的瀏覽器中進行。你的檔案不會被上傳到任何伺服器。
▶檔案大小上限是多少？
每個 PDF 檔案最大可達 50MB。合併時，一次最多可合併 20 個檔案。
▶壓縮會降低品質嗎？
壓縮會優化 PDF 結構同時保持可讀性。以文字為主的 PDF 壓縮效果比以圖片為主的更好。
▶Are my PDF files uploaded to a server?
No. All PDF processing happens entirely in your browser using WebAssembly technology. Your files are never uploaded to any server, making this tool safe for confidential, legal, or sensitive documents.
▶Is there a file size limit?
There's no hard limit, but very large files (100MB+) may process slowly depending on your device's memory and processing power. For optimal performance, files under 50MB work best in browser-based processing.
▶Can I merge PDFs in a specific order?
Yes. After selecting multiple files, you can drag and drop them to arrange the exact order before merging. You can also select specific page ranges from each file to include in the merged output.
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