PDF转换器

PDF Watermark

Add a text watermark to your PDF and download the updated file 所选文件仅在浏览器中处理，不会发送到转换服务器。免费且无需注册。

Add a PDF

Drag & drop a PDF here, or pick a file using the button.

Selected file: No file selected
Files are processed locally in your browser.
  • Non-Latin text (e.g. Japanese) may not render correctly in the MVP.
  • Tiled watermarks can be slow for large PDFs.

Watermark settings

Adjust text, style, and where to apply the watermark.

0.18
-45°

Overview

所选文件仅在浏览器中处理，不会发送到转换服务器。免费且无需注册。 PDF Watermark adds a text watermark like CONFIDENTIAL, DRAFT, or SAMPLE to your PDF and exports a new file. Processing happens locally in your browser for privacy.

How to use

Upload a PDF

Choose a PDF file or drag & drop it.

Customize watermark

Set text, size, color, opacity, rotation, and position.

Download

Apply the watermark and download the updated PDF.

使用场景举例

发送审阅稿前，可以加上DRAFT等文字。检查水印是否遮挡正文；水印本身不能阻止复制或编辑。

Features

Text watermark

Add clear labels like CONFIDENTIAL or DRAFT.

Page targeting

Apply to all pages or only specific pages.

Local processing

No uploads — runs in your browser.

FAQ

Can I add an image/logo watermark?

Not yet. MVP supports text watermark only.

Does this work with encrypted PDFs?

If the PDF is password-protected, watermarking may fail and an error will be shown.

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