Add Watermark to PDF

How to Add Watermarks to PDF Files

Our free PDF watermark tool lets you add custom text watermarks to your documents instantly. Simply upload your PDF, customize the watermark appearance, and download the watermarked file. The entire process happens in your browser — your files are never uploaded to our servers.

Features

• Custom Text: Add any text as a watermark, such as "CONFIDENTIAL", "DRAFT", or your company name
• Font Size Control: Choose font sizes from 12px to 120px to match your document
• Color & Opacity: Select any color and adjust transparency (5%-100%) for subtle or bold watermarks
• Rotation: Rotate your watermark from -180° to 180° for diagonal or custom angles
• Flexible Positioning: Place watermarks in the center, corners, or diagonally across pages
• Selective Application: Apply watermarks to all pages or specific page ranges
• 100% Private: All processing happens in your browser — no file uploads or server storage

Watermark Position Options

• Center: Places the watermark in the middle of each page
• Diagonal: Positions the watermark diagonally from top-left to bottom-right (default)
• Top-Left: Places the watermark in the upper-left corner
• Top-Right: Places the watermark in the upper-right corner
• Bottom-Left: Places the watermark in the lower-left corner
• Bottom-Right: Places the watermark in the lower-right corner

Common Use Cases

• Draft Documents: Mark documents as drafts or work-in-progress
• Confidential Files: Add "CONFIDENTIAL" or "INTERNAL USE ONLY" watermarks
• Copyright Protection: Watermark documents with your company name or copyright notice
• Document Tracking: Add date, version numbers, or identifier codes
• Branding: Apply your company logo text across all pages

Tips for Effective Watermarks

• Use 30-50% opacity for a subtle watermark that doesn't interfere with readability
• For draft documents, use diagonal positioning at 45° for a professional appearance
• Larger font sizes (60px+) work better for full-page visibility
• Use grayscale colors (#999999, #666666) for a professional, neutral look
• Test your watermark on the preview before applying to the full document

Frequently Asked Questions

Is my PDF file secure?

Yes, completely. Your PDF never leaves your computer. All watermarking happens in your browser using JavaScript, and no files are uploaded to our servers.

What file size limits are there?

You can upload PDF files up to 50MB. Processing time depends on the number of pages and your device's processing power.

Can I apply different watermarks to different pages?

Currently, you can apply the same watermark to all pages or a custom page range. To apply different watermarks, you'll need to watermark the document multiple times with different page ranges.

Can I add image watermarks?

This tool currently supports text watermarks. For image watermarks, you may want to convert your image to text or use a more advanced PDF editor.

What if I make a mistake?

Simply upload your original PDF again and apply the correct watermark settings. The original file is never modified.

Does this tool work on mobile?

Yes, but uploading and processing large PDFs on mobile devices may be slower. A desktop or tablet is recommended for better performance.

Can I undo the watermark?

No, once the PDF is downloaded with the watermark applied, it cannot be reversed. Always keep a backup of your original PDF.