PDF Watermarker Online Tool

Add text watermarks to PDF files with customizable fonts, colors, sizes, and positioning options. Perfect for document branding and protection.

Upload PDF Files

Drag & drop PDF files here or click to browse

Supports multiple PDF files (max 10MB each)

Watermark Options

Maximum 100 characters
20%
0.0 = left/top, 1.0 = right/bottom

Watermarking Results

Watermarks Applied Successfully!
Files Processed: 0
Input Size: 0 KB
Output Size: 0 KB
Download Watermarked PDFs:

Watermarked PDFs will appear here

How to Use This PDF Watermarker Tool

Adding Watermarks to PDFs - Step by Step

  1. Upload PDF files using drag & drop or file browser
  2. Enter watermark text and customize appearance
  3. Choose font, size, and color options
  4. Select placement (diagonal, horizontal, vertical, or custom)
  5. Adjust opacity and rotation if needed
  6. Click "Apply Watermarks" to process the files
  7. Download watermarked PDFs as a ZIP file

Watermarking Features & Options

Choose from Helvetica, Times New Roman, and Courier New fonts. Adjust font size (8-72pt), color, and opacity for professional-looking watermarks.

Diagonal: Rotated text across the page
Horizontal: Text along the top of the page
Vertical: Text along the left side
Custom: Precise positioning with X/Y coordinates

Process multiple PDF files simultaneously. All files receive the same watermark settings for consistent branding across documents.

Technical Details

Watermarking Process

  • Server-side processing: PDFs are processed securely on our servers
  • Apache PDFBox: Uses industry-standard PDF library
  • Text rendering: High-quality text rendering with precise positioning
  • Transparency support: Adjustable opacity for subtle watermarks

Supported Features & Limits

  • Max files: Multiple PDFs per operation
  • Max file size: 10MB per PDF file
  • Text length: Up to 100 characters
  • Font sizes: 8-72 points
  • Output format: ZIP file containing watermarked PDFs
  • Processing time: Depends on file count and size

Important Notes

  • File security: Uploaded PDFs are processed securely and deleted after processing
  • Quality preservation: Watermarking maintains original PDF quality and formatting
  • ZIP download: Generated ZIP files are valid for 30 minutes
  • Large files: Very large PDFs may take longer to process
  • Font compatibility: Uses standard PDF fonts for maximum compatibility

Frequently Asked Questions

The original PDF files are never stored permanently on our servers. They are processed in memory to add watermarks, and then immediately deleted. Only the watermarked result files are temporarily stored for download.

Currently, the tool only supports non-encrypted PDF files. If your PDFs are password-protected, you'll need to remove the password first using a PDF password remover tool before applying watermarks.

Download links for watermarked PDF ZIP files are valid for 30 minutes from the time of processing. After this period, the files are automatically deleted from our servers for security and storage reasons.

Currently, the tool supports standard PDF fonts (Helvetica, Times New Roman, Courier New) that are universally available and ensure maximum compatibility across different PDF viewers and devices.

Currently, all uploaded files receive the same watermark settings. If you need different watermarks for different files, you'll need to process them separately with different settings.