Add Watermark to PDF
Upload a PDF and overlay custom text on all or selected pages. Control font size, color, opacity, position, and rotation - everything processes locally in your browser.
Text overlaid on each selected page.
Typical watermarks use 36-72 pt.
Overrides the preset. Enter any hex value like #cc0000.
Center automatically applies a 45° diagonal.
Upload a PDF above to get started.
Why Use Our Add Watermark to PDF Tool?
Full Watermark Control
Customize every detail when you add watermark to PDF - choose font size, color, opacity, position, and rotation angle for a professional result every time.
Color & Opacity Picker
Pick from preset colors or enter any hex value, then dial in transparency with the opacity slider to create a watermark that is visible without obscuring content.
Instant In-Browser Processing
Add watermark to PDF pages in seconds directly in your browser. No server queues, no waiting - your watermarked PDF downloads immediately after processing.
Private & Secure - No Upload
Your PDF never leaves your device when you add a watermark. All processing happens locally in your browser, keeping sensitive documents completely confidential.
Common Use Cases for Add Watermark to PDF
Protect Confidential Documents
Add a CONFIDENTIAL watermark to PDF reports, contracts, and internal files to deter unauthorized sharing or reproduction.
Mark Draft Versions
Stamp DRAFT on every page before a document is finalized so reviewers know they are viewing a working version, not the approved release.
Share Sample Content
Add a SAMPLE watermark to PDF previews and proposal excerpts before clients or partners purchase or approve the full version.
Legal & Compliance Labeling
Add watermarks such as ATTORNEY-CLIENT PRIVILEGE or FOR REVIEW ONLY to legal PDFs to meet regulatory labeling requirements.
Educational Handouts
Watermark course materials and ebooks with your organization or instructor name to maintain attribution when distributing study documents.
Branding & Copyright
Overlay your company name or copyright notice as a semi-transparent watermark on PDF presentations, brochures, and published reports.
Understanding How to Add Watermark to PDF
What is a PDF Watermark?
A PDF watermark is a layer of text overlaid on top of existing page content to communicate status, ownership, or confidentiality. When you add watermark to PDF documents you embed a semi-transparent label - such as CONFIDENTIAL, DRAFT, SAMPLE, or your company name - directly into the page. Watermarks serve as a visual deterrent against unauthorized copying and help readers immediately understand the document's intended use or distribution restrictions. Unlike physical stamps, digital watermarks can be precisely positioned and styled to blend seamlessly with existing content.
How Our Add Watermark to PDF Tool Works
- Upload your PDF: Drop or select the PDF you want to watermark. The file is loaded directly in your browser using the pdf-lib library - no server upload required.
- Configure the watermark: Enter your watermark text, choose font size and color, set opacity with the slider, and pick a position (center, corners, or edges). For center placement, select a rotation angle such as 45° diagonal.
- Choose which pages to watermark: Apply the watermark to all pages, first/last page only, odd/even pages, or a custom set of comma-separated page numbers for precise control.
Watermark Options Explained
- Opacity: Controls how transparent the watermark appears - 5% is nearly invisible, 100% is fully solid. Most professional watermarks use 20-40% opacity.
- Position: Seven preset placements - center (diagonal), four corners, and two edge-center positions - cover every common layout need.
- Rotation: When using center placement, choose 0° (horizontal), 30°, 45° (classic diagonal), -45° (reverse diagonal), or 90° (vertical).
- Color: Select from preset swatches or enter any custom hex code. Gray is neutral and professional; red or blue signal urgency or branding.
Privacy, Security & Availability
Our add watermark to PDF tool processes your document entirely within your browser session. Your file is never transmitted to any external server or cloud service, which means sensitive contracts, legal filings, and proprietary reports remain completely private. The tool uses the open-source pdf-lib library for all text rendering and PDF manipulation. It is free to use with no signup, no account, and no usage limits - on desktop and mobile browsers.
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Frequently Asked Questions About Add Watermark to PDF
Yes. Choose "All Pages" in the Apply To setting and the watermark text will be overlaid on every page of your PDF automatically.
Yes. You can position the watermark at the center, top-left, top-center, top-right, bottom-left, bottom-center, or bottom-right of each page. The center position also supports diagonal rotation angles.
Yes. Use the opacity slider to set transparency from 5% (very faint, barely visible) up to 100% (fully solid). A typical document watermark uses 20-40% opacity.
No. All watermark processing runs entirely in your browser using client-side code. Your PDF never leaves your device and is never sent to any external server.
Yes. Use the "Apply To" setting to target all pages, first page only, last page only, odd pages, even pages, or enter custom comma-separated page numbers.
Any text you type - for example CONFIDENTIAL, DRAFT, SAMPLE, DO NOT COPY, your company name, or any custom label. Font size is adjustable from 6 to 300 points.
Yes. Pick from preset colors (gray, red, blue, green, orange, black) or enter any custom hex color code using the color picker. The default is light gray which is a neutral, professional choice.
Yes, the add watermark to PDF tool is completely free with no account, signup, or usage limits required.