PDF Tools

Add Watermark to PDF

Stamp a text watermark on every page — set the text, color, opacity, angle, and layout. Runs in your browser; your file is never uploaded.

Upload a PDF to preview every page here.
30%
48
The watermark is permanently merged onto every page and saved as a new PDF. All languages (incl. Korean) are supported.

How to watermark a PDF

1) Upload a PDF → 2) set text, color & angle → 3) apply & download

Everything runs in your browser, so your file is never uploaded to a server.

Is the watermark permanent?

Yes. It is merged into each page, so it shows in any PDF viewer and when printed.

Does Korean text work?

Yes — all languages and emoji are supported.

How to watermark a PDF

  1. 1
    Upload your PDFDrag a PDF into the box above or click to choose a file. It is read directly in your browser.
  2. 2
    Set your watermark textType the words you want and adjust the size, angle, and opacity until it looks right on every page.
  3. 3
    Download the watermarked PDFSave a new PDF with the watermark applied to all pages.

Why watermark a PDF here

  • Apply your text to every page at once
  • Control size, angle, and opacity
  • Runs in your browser — your PDF is never uploaded
  • No watermark from us, only the one you choose

PDF & Documents

Stamp a text watermark across your PDF

A watermark is a simple way to mark a PDF as confidential, draft, or yours before you share it. This tool overlays your own text, such as “CONFIDENTIAL” or a company name, across every page, and lets you control the wording, size, angle, and opacity so it is visible without hiding the content. It all runs in your browser, so the document never leaves your device.

Best results

  • Use a diagonal angle so the mark is hard to crop out
  • Lower the opacity so text underneath stays readable
  • Keep the wording short, like DRAFT or CONFIDENTIAL

Common fixes

  • Watermark hides the text? Lower the opacity
  • Too small to notice? Increase the size
  • Need it on only some pages? Split the PDF first, then watermark

Private by design

Watermarking runs entirely in your browser using client-side JavaScript. Your PDF is never uploaded, stored, or shared, so confidential files stay on your device.

Frequently asked questions

Is the PDF watermark tool free?

Yes. You can add text watermarks for free for everyday use, and Pro removes daily limits.

Can I control how the watermark looks?

Yes. You set the text, size, angle, and opacity so the watermark is clearly visible without covering your content.

Does it apply to every page?

Yes. The watermark text is stamped across all pages of the PDF in one step.

Are my files uploaded to a server?

No. Watermarking runs in your browser, so the file never leaves your device.

Can I remove the watermark later?

The exported PDF has the watermark merged into each page, so keep your original file if you may need a clean copy.