Add Watermark to PDF

Stamp text or an image across every page, with control over size, position, rotation and transparency. The file never leaves your browser.

Click to select PDF or drag and drop

Your file stays private - processed in your browser

Up to 20MB · No upload — processed on your device

How to Add Watermark to PDF

  1. 1. Upload your PDF file
  2. 2. Enter your watermark text
  3. 3. Customize font size, opacity, and position
  4. 4. Click "Add Watermark" and download your file

Features

✏️ Custom Text

Add any text as a watermark to your PDF documents.

🎨 Customizable

Control font size, opacity, and position of the watermark.

🔒 100% Private

All processing happens locally in your browser.

⚡ Fast Processing

Add watermarks instantly without uploading to servers.

Frequently Asked Questions

Is my file uploaded, and what is the maximum file size?

No upload is needed. This tool runs entirely inside your browser, so your file is never sent to a server. Files of up to 20MB are supported and processed locally on your own device.

How do I watermark a PDF?

Upload the file, type your watermark text or choose an image, adjust its transparency and download.

Can I use my own logo?

Yes. Upload a PNG or JPG and it is stamped onto every page.

Can the watermark be diagonal?

Yes. Set the rotation angle, for example 45 degrees for a classic diagonal stamp.

Are my files uploaded?

No. The file is processed by JavaScript inside your own browser, so it is never uploaded to a server.