How to Add Watermark to PDF
Learn how to add watermarks to PDFs.
About How To Add Watermark To PDF
Adding a watermark stamps a text or image overlay onto every page of a PDF — used for branding, draft marking, and confidentiality notices. PDF AI Tools places watermarks at any angle, opacity, and position entirely in the browser with no server upload.
Customize every aspect: font, size, color, angle (–180° to +180°), opacity, and page range. Place watermarks in the center, corner, or tile across the full page. Both images (logos) and text watermarks are supported.
How We Compare
Compared to desktop alternatives like Adobe Acrobat Pro (starting at $19.99/month), Smallpdf ($12/month for unlimited), or iLovePDF ($9/month Premium), PDF AI Tools delivers comparable quality at $0 for the core feature set. We skip the subscription friction by processing most operations directly in your browser with WebAssembly — no server infrastructure costs to pass on to users. Our AI features (summarization, chat, OCR) use a pay-as-you-go backend that keeps your total cost well under $5/month even for power users.
How to Use How to Add Watermark to PDF
- Step 1: Upload your PDF to the Watermark PDF tool
- Step 2: Type your watermark text or upload a logo image
- Step 3: Set opacity, angle, and position
- Step 4: Preview the result and click Apply to download
Why Choose PDF AI Tools
We've built PDF AI Tools to replace expensive desktop software like Adobe Acrobat for 95% of common document workflows — at zero cost to you. Unlike competitors who gate features behind paywalls, add watermarks, or limit file sizes, our tools are genuinely free and genuinely unlimited. Your privacy matters: files processed client-side in your browser never touch our servers, and even AI-powered features use encrypted, auto-deleting processing pipelines.
Key Features
- Text and image (logo) watermarks
- Adjustable opacity, angle, size, and color
- Tiled, center, or corner placement modes
- Apply to all pages or a custom page range
- Preview watermark position before applying
- Browser-based — no file upload
- Handles PDFs with mixed orientations
- Download watermarked PDF instantly
Frequently Asked Questions
Can I add a logo as a watermark?
Yes — upload a PNG image (transparent background recommended) and position it on the page.
How do I make a "CONFIDENTIAL" watermark?
Enter CONFIDENTIAL as the text, set font size to 48, angle to -45°, and opacity to 30%.
Can I watermark only certain pages?
Yes — specify a page range in the advanced options.
Can the watermark be removed?
The watermark is embedded in the PDF content layer, not as a removable annotation.