Watermark PDF: Free Online PDF Watermark Tool
Add text or image watermarks to PDF documents instantly. Customize opacity, position, rotation, and appearance with a live preview. No uploads, no limits — 100% private.
Text & Image Watermarks
Add custom text like “CONFIDENTIAL” or upload your logo as an image watermark. Both modes with live preview.
Full Customization
Control opacity, size, rotation, color, font, and position. See every change in real time before downloading.
100% Private
Your files never leave your device. All watermarking happens in your browser — no server uploads, no cloud processing.
Add Watermark to PDF
Add text or image watermarks to your PDF documents
Drag & drop your PDF here
or click to browse
100% Private
All processing happens in your browser. Your files never leave your device.
Fast Processing
Add watermarks to your PDFs instantly with our optimized processing.
Customizable
Choose position, opacity, size, and more to get the perfect watermark.
Best Free PDF Watermark Tool Online
Need to add a watermark to a PDF? Our free PDF watermark tool lets you insert custom text or image watermarks onto any PDF document instantly. Unlike iLovePDF or SmallPDF that upload your sensitive documents to remote servers for processing, our tool handles everything directly in your browser — your files never leave your device. Protect confidential reports, mark drafts, add copyright notices, or brand documents with your company logo, all with complete privacy and no daily limits.
The watermark tool generates the actual watermarked PDF in memory and renders a live preview, so what you see on screen is exactly what you get in the download. Adjust opacity, rotation, size, color, and position in real time. Whether you are stamping “CONFIDENTIAL” on legal contracts or overlaying a logo across a photo portfolio, every setting is visible before you commit. No registration, no watermarks added by us, and no file size limits — just fast, private PDF watermarking.
How to Add a Watermark to a PDF
How to watermark a PDF in 4 simple steps:
- Upload your PDF file by dragging it into the upload area or clicking to browse your device
- Choose text or image watermark mode and enter your text or upload your logo
- Customize appearance — adjust opacity, size, rotation, color, font, and position using the live preview
- Click download to save your watermarked PDF instantly — no waiting for server processing
When You Need to Watermark a PDF
Confidential Documents
Stamp “CONFIDENTIAL” or “INTERNAL USE ONLY” across legal agreements, financial reports, and HR documents to deter unauthorized sharing.
Draft Marking
Add a clear “DRAFT” watermark to proposals, contracts, and manuscripts so reviewers know the document is not final.
Copyright Protection
Overlay copyright text or a © notice on research papers, ebooks, and published PDFs to assert ownership and discourage piracy.
Company Branding
Place your company logo on white papers, case studies, presentations, and client deliverables for a professional, branded appearance.
Photo Portfolios
Protect photography or design portfolios shared as PDFs by overlaying a semi-transparent logo or name across every page.
Proof Copies
Mark proofs and review copies with “SAMPLE” or “NOT FOR DISTRIBUTION” before sending to clients or stakeholders for approval.
Frequently Asked Questions
What is the difference between text and image watermarks?
Text watermarks let you type any custom message such as "CONFIDENTIAL", "DRAFT", or a copyright notice directly onto your PDF. Image watermarks let you upload a logo, stamp, or any image file to overlay on your pages. Both types support full customization of size, position, opacity, and rotation.
Can I adjust the watermark opacity?
Yes! You can set the opacity from fully transparent to fully opaque using the opacity slider. A lower opacity (around 20-40%) creates a subtle watermark that protects the document without obscuring the content underneath. You can preview the result in real time before downloading.
Can I apply the watermark to all pages or specific pages?
Our watermark tool applies the watermark to every page in your PDF. This ensures consistent branding or protection across the entire document. If you need to watermark only specific pages, use our Organize PDF or Split PDF tools to extract those pages first, watermark them, then merge everything back together.
Can I remove a watermark after adding it?
The watermark is permanently embedded into the downloaded PDF. We recommend keeping a copy of your original unwatermarked file before adding a watermark. Since all processing happens in your browser, your original file on disk is never modified - only the downloaded copy contains the watermark.
Can I use custom fonts and colors for text watermarks?
Yes! You can choose from multiple font options and pick any color using the color picker. Adjust font size, weight, and color to match your branding or to create the exact look you need for confidentiality notices, draft labels, or copyright text.
What position options are available for watermarks?
You can place watermarks in preset positions including center, top-left, top-right, bottom-left, and bottom-right. You can also set a custom rotation angle to create diagonal watermarks. The live preview shows you exactly where the watermark will appear before you download.
Does the watermark tool work on mobile devices?
Yes! Our watermark tool is fully responsive and works on smartphones and tablets. The interface adapts to smaller screens so you can add watermarks to PDFs on the go. All processing happens in your mobile browser with no app installation required.
Is this watermark tool really free?
Yes, completely free with no limits. Unlike iLovePDF or SmallPDF that restrict free users to a handful of tasks per day and require paid plans for full access, PDF Smaller lets you watermark unlimited PDFs with no registration, no daily caps, and no watermarks added by us.