Can I use an image as a watermark?

This tool supports text watermarks for speed and small file size. Image watermarks are on the roadmap.

Is the watermark removable?

A watermark baked into the page content is part of the PDF. Treat it as permanent for recipients.

A 45° diagonal across the center of each page, sized and opacified to your preference.

Yes — the watermark is applied uniformly to all pages in the document.

Stamp diagonal text watermarks across every PDF page — private.

100% private — no uploads PDF ToolsFree & unlimited Read tutorial

Watch a quick simulation of this tool in action — no file needed.

Follow these steps — everything happens instantly in your browser.

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Step 1. Drop your PDF onto the zone.
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Step 2. Type your watermark text and adjust opacity and size with the sliders.
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Step 3. Click “Add watermark & download” — the watermark is applied to every page.

All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.

No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.

No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.

Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.

Everything you might want to know about add pdf watermark.

Stamp page numbers onto every page of a PDF — pick position & start.

Combine multiple PDF files into one — free, private, instant.

Rotate every page in a PDF by 90°, 180° or 270° — no upload.

View and edit PDF title, author, subject & keywords — locally.

Want to learn more?

Read our complete Add PDF Watermark tutorial with tips, use cases, and FAQs.