Đóng dấu bản quyền PDF

Stamp drafts, confidential copies, approvals, ownership text, or a logo onto PDF pages. The watermark is added locally on Convertr servers with open PDF libraries and no signup.

Text or logo

Use typed marks or PNG/JPG images.

Lên tới 1GB

Full upload limit stays available.

Phân tích dữ liệu bảo vệ quyền riêng tư

No filenames, text, logos, or PDF content.

25%
64 pt
-35 degrees

Làm thế nào để làm cho PDF Watermark

  1. 1Upload the PDF that needs a watermark.
  2. 2Choose a text watermark or upload a PNG or JPG logo.
  3. 3Set opacity, size, rotation, position, repeat mode, and page range.
  4. 4Download the watermarked PDF.

Thêm công cụ PDF

Ký PDFFill a PDF and add a visible signature before or after watermarking. Thêm Số Trang vào PDFNumber drafts or final documents after watermarking. Hợp Nhất PDFCombine documents before stamping one watermark across the final PDF. Tách PDFExtract selected pages before applying a watermark. Xoay PDFFix orientation before placing approval or confidential marks. Trình nén PDFReduce file size after adding a watermark. Xóa siêu dữ liệu PDFClean document metadata before sharing watermarked files. Tính PDFFinalize watermark appearances with PDF fields, markups, and layers.

Câu hỏi thường gặp

Is this PDF watermark tool free?

Yes. You can add text or image watermarks to PDF files for free, with no account and no paid third-party watermarking service.

Can I add a logo watermark to a PDF?

Yes. Upload a PNG or JPG image and choose its size, opacity, rotation, placement, and whether it repeats across the page.

Does watermarking reduce PDF quality?

No quality reduction is added to save server load. The tool imports the PDF pages and draws the watermark on top instead of rasterizing pages into images.

Can I watermark only selected pages?

Yes. Use page ranges like 1, 3-5, or 2-z to watermark selected pages.

Kích thước tệp PDF tối đa là bao nhiêu?

You can upload PDF files up to 1 GB, the same upload limit used by Convertr tools.

Are watermark text, logos, or filenames sent to analytics?

No. Analytics records safe buckets such as watermark type, placement, file size, page count, and failure reason. It does not record filenames, watermark text, logo content, or PDF content.