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Add Watermark to PDF Online

Add custom text or image watermarks to one or more PDF pages. Set the position, opacity, rotation, and appearance, then download the watermarked PDF.

  • Runs in your browser

    Files are never uploaded — they stay on your device.

  • No page limit

    Any document size, no per-page caps or quotas.

  • No watermarks

    Clean output with no branding added.

  • No sign-up

    Just open the tool and use it — no email, no account.

All processing happens in your browser. Your files are never uploaded.
How to verify

Verify in 3 steps

No promises to take on faith — check it yourself in about 30 seconds.

  1. 1Open DevTools → Network tab
  2. 2Add a file and run the tool
  3. 3Confirm: no request carries your file

Once the page has loaded you can also unplug the network — every tool keeps working.

Full method & limits

Key Features

Text Watermark

Type a custom message such as DRAFT, CONFIDENTIAL or your company name. Chinese and other languages are supported because the text is rendered with your system fonts.

Image & Logo Watermark

Upload a logo, stamp or signature image and place it on the document as a watermark layer.

Position & Size

Choose one of nine positions or tile the mark across the page, and set how large the watermark should be relative to the page.

Opacity & Rotation

Lower the opacity to keep the page readable, and rotate to any angle including 45 degrees for a diagonal mark.

Page Range

Apply the watermark to every page, or to a selected range such as 1-3,5,8-10 using the page picker or a range string.

Private & Local

Watermarking runs entirely in your browser with pdf-lib. Your PDF is never uploaded to any server.

How to Use

1

Add a PDF

Drag and drop or select the PDF you want to watermark. The file is processed locally in your browser.

2

Set the Watermark

Choose text or image, then adjust the content, color, size, opacity, rotation, position and the pages to cover. The preview updates as you change options.

3

Apply and Download

Run the tool to create a new watermarked PDF, open the result to check it, then download the file.

Add Watermark Example

A contract is marked CONFIDENTIAL so recipients know it is a draft.

PDF
contract.pdf

A PDF that should be labelled as confidential before sharing.

PDF
contract-watermarked.pdf

The same pages now show a CONFIDENTIAL watermark while the original text stays readable.

How to Add a Watermark to a PDF

How to Add a Watermark to a PDF

Upload a PDF, enter text or add a logo, customize its position and opacity, and apply the watermark to all pages or selected pages.

How to Add a Watermark Online

  1. Upload your PDF.
  2. Choose a text or image watermark.
  3. Set the font, color, size, opacity, position, and rotation.
  4. Choose all pages or a page range.
  5. Preview the result and apply the watermark.
  6. Download the watermarked PDF.

Common Watermark Uses

  • DRAFT.
  • CONFIDENTIAL.
  • FOR REVIEW.
  • Company names and logos.
  • Copyright notices.
  • Internal-use labels.

Text or Image Watermark?

Use a text watermark for status labels and notices. Use an image watermark for logos, signatures, stamps, or branded documents.

Position, Opacity and Rotation

Place the watermark at one of nine positions, or tile it across the page. Lower the opacity to keep the page readable, and rotate to any angle — 45 degrees is commonly used for a diagonal DRAFT or CONFIDENTIAL label.

Choose the Pages

Apply the watermark to every page, or select a range such as 1-3,5,8-10 using the page picker or a range string. Only the selected pages receive the watermark.

Related Tools

Frequently Asked Questions

Can I add a text watermark to a PDF?

Yes. Enter a custom message such as DRAFT, CONFIDENTIAL or your company name, then adjust its size, color, opacity, position and rotation.

Can I add a logo or image watermark?

Yes. Upload a logo, stamp or signature image and place it on the selected pages or the entire document as a watermark layer.

Can I add a watermark to every page?

Yes. Leave the page range empty to watermark every page, or enter a range such as 1-3,5 to watermark only those pages.

Can I make a watermark transparent?

Yes. Use the opacity control to lower the watermark so the document stays readable while the mark remains visible.

Can I rotate or place a diagonal watermark?

Yes. Set any rotation angle, including 45 degrees for a diagonal watermark across the center of the page.

Will the watermark be permanent?

The exported PDF contains the applied watermark as an image layer. The watermark cannot be edited as separate text after export and the original file is left unchanged.

Can I watermark multiple PDF files?

This version processes one PDF at a time. To watermark several documents with the same settings, run them one after another; batch watermarking multiple PDFs is planned for a later release.

Are my PDF files uploaded?

No. Watermarking runs locally in your browser with pdf-lib. Your PDF never leaves your device and is not sent to any server.