Watermark PDF
Stamp a text watermark across every page of a PDF — CONFIDENTIAL, DRAFT, COPY, or your own text. Adjustable opacity, diagonal or horizontal. Free and fully in your browser.
Select a PDF to watermark, or drop it here
Stamp a text watermark across every page.
Processed 100% locally
The watermark is added as real text and your PDF is never uploaded.
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Frequently asked questions
How do I add a watermark to a PDF?
Upload your PDF, type the watermark text (or pick a preset like CONFIDENTIAL or DRAFT), set the opacity, and download. The watermark is drawn across every page. Everything runs in your browser.
Is it free, and is my PDF uploaded?
It's completely free with no watermark on the output beyond the one you add, and no sign-up. Your PDF is processed entirely on your device — it's never uploaded to any server.
Does the watermark stay selectable text?
Yes. The watermark is added as real vector text layered over each page, and the original page content (text, images) is preserved — the PDF is not flattened to images.
Can I make the watermark lighter or horizontal?
Yes. Use the opacity slider to make it subtle or bold, and toggle the diagonal (45°) option off for a horizontal watermark.
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All on-device — nothing you open here is uploaded.