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Chạy trong trình duyệt · Không tải lên

Hiện tại công cụ này và hướng dẫn trên trang vẫn bằng tiếng Anh. Nó hoạt động y như vậy: mọi thứ chạy trong trình duyệt của bạn.

Drag & drop a PDF here

or

One PDF file

Your files stay on your device. Nothing is uploaded.

  • Không có gì rời khỏi thiết bị của bạn
  • Máy chủ không giới hạn kích thước
  • Không đăng ký, không hình mờ
  • Miễn phí

How to compress a PDF

  1. Choose your PDF.
  2. Pick how much to compress: Recommended is a good balance.
  3. Press Compress, check the new size and download.

How it works

  • Photos and scanned pages inside the PDF are re-saved as JPEG at a lower quality, and very large ones are scaled down (to 2400, 1700 or 1100 pixels on the longest side, depending on the level).
  • An image is only replaced when the new version is smaller.
  • Text, fonts and vector graphics are copied unchanged, so text stays sharp and selectable.
  • Unused objects are removed and the file structure is packed.

When it helps

PDFs made from scans, phone photos or slides with pictures often shrink by 50–80%. PDFs that are mostly text are usually small already, so they shrink little; the tool tells you honestly when there was nothing to gain.

Your PDF stays in your browser

The file is read and changed on your device. Nothing is uploaded, so contracts, statements and IDs stay private.

Câu hỏi thường gặp

Will the text get blurry?

No. Only images are re-compressed. Text and vector drawings are not changed.

Can I compress a password-protected PDF?

Password-protected PDFs must be unlocked first with Unlock PDF (you need the password).

Is there a size limit?

No server-imposed file size limits. Very large PDFs simply need more memory and time on your device.

Is my PDF uploaded?

No. Everything happens in your browser.