Free · No Upload · No Watermark · No Signup

💧Add Watermark to PDF — Free & Private

Before a document goes out for review, it often needs a visible status: CONFIDENTIAL, DRAFT, SAMPLE, DO NOT COPY. This tool stamps your chosen text diagonally across every page of the PDF — large, evenly placed, and at an opacity you control, so it labels the document without making it unreadable.

Type any text you like and set the opacity between a whisper-faint 5% and a bold 60%. The watermark scales automatically to each page's dimensions, so mixed portrait/landscape documents come out looking consistent.

It's a small irony of the industry that many “free” PDF sites add their own watermark to your file unless you pay — and upload your document in the process. PrivtePDF does the opposite: the only watermark is the one you ask for, and the PDF is processed entirely in your browser with no upload and no account.

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Add Watermark

Stamp a text watermark on every page

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PrivatePDFFree PDF tools · Your file never leaves your device
No uploadNo watermarkNo accountFree forever

PrivtePDF uses browser-based PDF processing (pdf-lib). Compatible with Chrome, Firefox, Safari, Edge. Merge PDF · Split PDF · Compress PDF · Images to PDF · Delete PDF Pages

How to add a watermark to a PDF

  1. 1Drop your PDF into the box below.
  2. 2Type the watermark text (e.g. CONFIDENTIAL) and set the opacity with the slider.
  3. 3Click “Add Watermark” — the stamped PDF downloads immediately.

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Frequently asked questions

Can I use my own custom watermark text?

Yes — type anything: CONFIDENTIAL, DRAFT, your company name, a case number. The text is rendered in bold capitals diagonally across each page.

Does the watermark appear on every page?

Yes, it's stamped on all pages automatically and scales to each page's size, so portrait and landscape pages both look right.

Can I control how visible the watermark is?

Yes. The opacity slider goes from 5% (a subtle background hint) to 60% (a strong, unmissable stamp). 20% is a good default for review copies.

Is watermarking done without uploading my PDF?

Correct — the stamp is drawn onto the PDF locally in your browser. Documents marked CONFIDENTIAL genuinely stay confidential.

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