Watermark PDF

Watermark PDF

Add text or image watermark to your PDF.

Text or image watermarks
Adjustable opacity & rotation
Position options
Tile/mosaic support
PDF

PDF 加水印一览

加水印前需要了解的要点。

价格
免费,不加我们的标识。 无需注册。免费账户可一次处理 3 个 PDF。
支持格式
任意 PDF,加文字或图片。 可输入中文或英文文字(如“机密”、CONFIDENTIAL),或上传 PNG 等格式的 Logo、印章、签名图片。
输出
带水印的 PDF。 大小、颜色、透明度、角度和位置可调,可自由拖动,也可平铺满页。
限制
未登录:1 个 PDF,最大 80 MB。 免费账户:一次 3 个 PDF,单个 80 MB,总计 120 MB。
适用于
任意浏览器,免安装。 iPhone、安卓手机、Windows、Mac、Linux 和 Chromebook。
隐私
安全处理,随后删除。 HTTPS 加密传输,文件在一小时内自动删除。

How to watermark a PDF

1
Add your PDF from your device, or pull it from Google Drive, Dropbox, or OneDrive. Without an account: 1 file, up to 80 MB. With a free account: up to 3 files, 80 MB each (120 MB total). Watermark several files at once and they come back as a ZIP.
2
Pick your watermark type. Type some text like CONFIDENTIAL or DRAFT, or upload an image such as your logo or stamp. Switch between text and image mode at any time.
3
Customise position, rotation, transparency, font size, and colour - or just drag the watermark anywhere on the live page preview to place it exactly. Switch on mosaic mode to tile it across the page (with an adjustable spacing slider), or keep it as a single stamp.
4
Choose where it applies - every page, just the page you are previewing, or tick the exact pages you want.
5
Click Add Watermark to apply. Download the watermarked PDF (or a ZIP for multiple files), save it back to the cloud, or open another tool next.

Why use our Watermark PDF tool

Text or image
Type a label like DRAFT or your company name, or upload a logo or stamp image. Switch modes at any time to redo the same file with a different style.
Drag to place
Drag the watermark anywhere on the live page preview to position it exactly, then tap any preset dot to snap it back to a standard spot.
Position anywhere
Nine standard positions: corners, centre edges, or middle of the page - or drag it freely. Pick where the watermark sits and it stays put on every page.
Rotation control
Tilt the watermark to any angle - keep it upright, slant it slightly, or rotate fully diagonal for a classic stamped look.
Transparency slider
Make the watermark bold and solid, or fade it down to a subtle background tint that does not interfere with reading.
Batch watermarking
Watermark up to three PDFs at once with the same style - they are processed together and download as a single ZIP.
Choose which pages
Stamp every page, only the current page, or tick the exact pages you want from the thumbnail strip - cover-only marks, specific sections, or the whole document.
Auto-remove background
Uploading a logo on a white background? Hit one button and the background is stripped automatically - no need to pre-make a transparent PNG.
Tile with spacing control
Mosaic mode repeats your watermark in a grid across the whole page - the classic anti-copy pattern - and a spacing slider sets how far apart the repeats sit.
Cloud import
Pull files from Google Drive, Dropbox, or OneDrive without a local download step.
Free, no signup
No signup required for single jobs, no per-day cap, and the only watermarks added are the ones you set yourself.

Frequently asked questions

PDF 怎么免费加水印?

在上方添加 PDF,输入水印文字或选择图片,设置样式和位置后下载,所选的每一页都会加上水印。完全免费,我们不会加任何自己的标识。

水印文字支持中文吗?

支持。直接输入“机密”“内部资料”“草稿”等中文即可,以粗体显示,颜色、透明度、大小和角度都可以调整,也可以平铺满页。水印文字可以被复制和搜索。

怎么用公司 Logo 或印章做水印?

选择图片水印,上传 Logo、印章或签名图片,透明背景的 PNG 效果最好。调整大小、透明度和角度后放到合适位置。

PDF 水印怎么铺满整页?

开启平铺(马赛克)模式,水印会在每一页上重复排列,调整间距可以让它更密或更疏。

怎么让每一页都有水印,或只加在某几页?

可以应用到全部页面,或选择 Range 并输入页码,例如只加在封面就输入 1,或输入 1-3, 5, 8。

水印能放在任意位置吗?

可以。从九个预设位置中选择,或在预览上按住水印拖动到任意位置。

PDF 加水印怎么才不容易被去掉?

水印写入页面内容本身,而不是作为可删除的批注,无法一键删除。不过任何 PDF 都可能被刻意修改;如需更强保护,可再用 加密 PDF 禁止编辑。

你们能帮我去除 PDF 水印吗?

不能。本工具只用于添加水印,不提供去水印功能。如果收到的文件带有他人的水印,请向文件所有者索要无水印版本。

可以批量给多个 PDF 加水印吗?

免费账户一次最多 3 个 PDF(单个 80 MB,总计 120 MB),每个文件可单独设置,结果打包成一个 ZIP 下载。

文件安全吗?

安全。文件通过 HTTPS 加密传输,在我们的服务器上加水印,一小时内自动删除,不会分享给任何人,也不会用于训练 AI。

Use our other tools