Watermark PDF — Add Watermark Online Free
Add text watermarks to your PDF documents. Instantly. No sign-up required.
How to watermark pdf
- 1Upload your PDF file using the drop zone above or click to browse
- 2Enter your watermark text and customize the appearance — font size, opacity, color, and position
- 3Click "Add Watermark" to apply the watermark to every page
- 4Download your watermarked PDF file
About This Tool
Adding a watermark to a PDF is one of the most effective ways to protect your documents, mark them as drafts, or label them as confidential. Whether you are sharing contracts with clients, circulating internal reports, or distributing proofs that should not be redistributed, a visible text watermark clearly communicates the status and ownership of the document. This free watermark pdf tool lets you stamp any text across every page of your file in just a few clicks.
Our watermark pdf tool processes everything directly in your browser using client-side JavaScript and the pdf-lib library. Your documents are never uploaded to a server, which means your sensitive files stay on your device at all times. You can customize the watermark text, font size, opacity, color, and positioning to get exactly the look you need. Choose a subtle diagonal watermark for drafts or a bold centered stamp for confidential documents. There are no file-size limits beyond what your browser can handle, no daily usage caps, no accounts to create, and no watermarks added by the tool itself — only the watermark text you choose will appear on your pages.
Frequently Asked Questions
Yes, it is 100% free with no hidden fees, no premium features locked behind a paywall, and no account required. You can watermark as many PDFs as you like at no cost.
Absolutely. All processing happens directly in your browser using client-side JavaScript. Your PDF files are never uploaded to any server, so your data remains private and secure on your own device.
Yes. You can change the watermark text, font size, opacity (transparency), color, and choose between a diagonal or centered horizontal position. This gives you full control over how the watermark looks on your pages.
Yes, the watermark is applied to every page of the PDF. This ensures consistent branding or labeling throughout the entire document.
The watermark is permanently embedded into the PDF. We recommend keeping a copy of your original file before adding a watermark, so you always have the unwatermarked version available.