Adding a watermark to a PDF protects your documents, marks drafts, or establishes ownership. ModernPDF stamps text or image watermarks onto every page right in your browser —...
Open Watermark PDFProtect your documents instantly. Free to start.
Documents that need watermarks — drafts, confidential files, IP — are exactly the ones that shouldn't be uploaded to servers.
Set watermark text, font size, color, opacity, angle, and position. Apply to all pages or a specific range.
Watermarks are applied locally in seconds. No server queue, no processing delay, no waiting for downloads.
Drop your document into the watermark tool. Preview the pages that will receive the watermark.
Type your watermark text, adjust size, color, opacity, and rotation. Preview the result on your actual pages.
The watermark is stamped onto every selected page. Download the watermarked PDF immediately.
Choose your watermark text (e.g., "CONFIDENTIAL", "DRAFT", your company name), set the opacity and position, and apply it across all pages or specific ones. For document protection beyond watermarks, see Protect PDF for password encryption. The watermarked PDF downloads immediately.
Free users get 3 watermarking tasks per day. Each task can watermark a full document regardless of page count.
The irony of most online watermark tools is hard to miss. You want to mark a document "CONFIDENTIAL" — so you upload it to a server operated by a company you don't know, in a jurisdiction you can't verify.
Documents that need watermarks are inherently sensitive. Drafts, pre-release materials, proprietary information, legal documents — these need protection, not exposure to third-party servers.
ModernPDF applies watermarks entirely in your browser. The PDF pages are rendered, the watermark is composited onto each page, and the result is assembled into a new file. The confidential document you're trying to protect never leaves your device.
The current version supports text watermarks with full customization of font, size, color, opacity, and angle. Image watermarks are on the roadmap.
Watermarks are applied as a semi-transparent overlay. You control the opacity — lower values let more of the underlying content show through. The default setting is readable but doesn't obscure the document.
Watermarks applied by ModernPDF are embedded into the PDF. They can't be easily removed by the recipient, which is the point for protecting drafts and confidential documents. Keep your original unwatermarked file for your records.
Yes. You can apply the watermark to all pages, a specific range (e.g., pages 2-5), or individual pages. This is useful for cover pages that don't need a watermark.
Yes. The watermark appears in the same position, size, and opacity on every selected page, regardless of page dimensions or content layout.
Free to start. Files stay on your device. Upgrade to Pro for unlimited use.
Open Watermark PDF