How to Add a Text Watermark to Every Page of a PDF for Free

What a text watermark does

A text watermark overlays a word or short phrase, such as CONFIDENTIAL, DRAFT, SAMPLE, or COPY, across each page of a PDF. It usually sits at a 45-degree diagonal at reduced opacity, so the original text and images stay readable underneath.

Watermarks signal status and ownership. They mark a document as a working draft, flag sensitive material, or discourage unauthorized reuse. Because the stamp repeats on every page, a reader cannot mistake one page for a final or unrestricted version.

Add a watermark to every page in 3 steps

Use the free tool at /convert/watermark-pdf. The whole process takes under a minute, and no software install is required.

• Step 1: Open /convert/watermark-pdf and select your PDF, or drag it onto the page. The file loads directly into your browser.
• Step 2: Type your watermark text (for example, CONFIDENTIAL or DRAFT) and adjust the angle, size, and opacity in the page preview.
• Step 3: Apply the watermark to all pages and download the new PDF. The original stays untouched; you get a fresh stamped copy.

Choosing the right watermark settings

• Text: Keep it short. Single words like CONFIDENTIAL, DRAFT, or COPY read clearly at a glance.
• Angle: A 45-degree diagonal is the convention and spreads the text across the most page area.
• Opacity: Use a light, semi-transparent value so the watermark is visible but the underlying content stays legible.
• Size and color: Scale the text large enough to span the page, and use a neutral gray for a subtle stamp or a bolder tone for a strong warning.

100% private: your PDF never leaves your device

Every step runs locally in your browser using your own device's processing power. The PDF is never uploaded to a server, never stored, and never seen by anyone else. That matters most for the documents people watermark: contracts, financial statements, and internal drafts.

Because nothing is transmitted, there is no account to create and no upload queue to wait on. Close the tab and no copy of your file remains anywhere but your own computer.

Genuinely free, with no watermark on the output

The tool is free with no signup, no daily limits, and no trial. It does not add its own branding to your file. The only watermark on the downloaded PDF is the text you chose, so you get a clean, professional document rather than one stamped with someone else's logo.

Other PDF tools you can run in the browser

• Merge or split pages with /convert/merge-pdf and /convert/split-pdf.
• Convert pages to images with /convert/pdf-to-jpg; multi-page PDFs download as a ZIP of images.
• Turn images into a PDF with /convert/jpg-to-pdf, or pull plain text out with /convert/pdf-to-text.
• Edit existing PDF text in the browser at /edit, reusing the document's real embedded font.