什麼是 免費 PDF 壓縮器？
免費線上 PDF 壓縮工具。壓縮 PDF 檔案大小，便於儲存與分享。所有處理在瀏覽器本機完成，檔案安全不洩漏。
為什麼要使用 免費 PDF 壓縮器？
- Removes metadata to reduce file size
- Optimizes PDF structure for smaller output
- Side-by-side size comparison
- Your files are processed locally — never uploaded
如何使用 免費 PDF 壓縮器 — 逐步教學
1
Upload a PDF file by clicking or drag-and-drop.
2
View the original file size.
3
Click Compress to reduce the file size.
4
Download the compressed PDF and compare the savings.
免費 PDF 壓縮器適合誰？
- 電子郵件附件
- 網頁上傳
- 減少儲存空間
- 線上分享文件
免費 PDF 壓縮器 — 常見問題
PDF 壓縮可以減少多少檔案大小？
Savings vary depending on the content. Text-heavy PDFs typically compress 20-50%. Scanned document PDFs may see smaller reductions since the images are already compressed.
壓縮會影響品質嗎？
Our compressor works by removing metadata and optimizing structure without re-encoding images. For significant size reduction on image-heavy PDFs, try converting to black and white or reducing image resolution first.
準備好使用 免費 PDF 壓縮器 了嗎？
免費線上工具 — 在瀏覽器中運作，無需註冊。立即開始使用。
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