Add a CONFIDENTIAL Watermark

Mark a document confidential across every page.

无需登录文件保持私密

将文件拖放到此处或点击浏览

PDF 无文件大小限制

浏览文件

你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。

Stamp a text watermark (CONFIDENTIAL, DRAFT, your name…) across every page of a PDF. Runs entirely in your browser; the PDF is never uploaded.

confidential documents tips

🔒

A diagonal "CONFIDENTIAL" at ~20% opacity reads clearly without obscuring the text.

🎨

Red conveys sensitivity; gray is subtler for internal docs.

📄

The watermark is applied to all pages so no page can be shared "clean".

🔒

Sensitive files are watermarked in your browser — never uploaded.

选择文件

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

处理

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

下载

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓完全免费——永远没有隐藏费用

✓无需账号、邮箱或登录

✓文件永远不会离开你的设备

✓绝无文件大小限制

✓所有输出均无水印

Add a DRAFT Watermark

Clearly mark a document as a draft before sharing

Watermark with Your Name or Brand

Stamp your name or company across a PDF you're sha

Mark a Document as a SAMPLE

Watermark preview or sample PDFs you distribute pu

Mark Documents INTERNAL ONLY

Flag internal documents so they aren't shared exte