About PDF Watermarking Tool
PDF Watermarking adds customizable text overlays to PDF documents for branding, copyright protection, and document status indication. Supporting flexible positioning (diagonal, header, footer, center), adjustable opacity (5-100%), multiple colors, and font sizes, the tool enables professional watermark application to all pages or selective page ranges. Using pdf-lib's drawText method, processing occurs entirely client-side without server uploads.
This solution serves businesses protecting intellectual property, agencies branding client deliverables, legal firms marking document status (DRAFT, CONFIDENTIAL), and content creators preventing unauthorized distribution. Whether marking presentations with company logos in text form, stamping contracts as SAMPLE, or adding copyright notices to reports, the tool delivers instant watermarked PDFs without desktop software subscriptions.
Technical Capabilities
- â–¸Four Positioning Options: Diagonal center (classic watermark), horizontal center, header (top align), or footer (bottom align). Live preview shows watermark appearance before processing.
- â–¸Adjustable Opacity Control: 5-100% opacity slider with real-time preview. Low opacity (10-30%) for subtle background watermarks, high opacity (70-100%) for prominent branding. Prevents complete text obscuration.
- â–¸Multiple Font Sizes: Small (24pt), Medium (48pt), Large (72pt), Extra Large (96pt). Font size selection based on page dimensions and watermark prominence requirements.
- â–¸Color Customization: Four color options: Gray (neutral), Red (urgent/draft), Blue (corporate), Black (traditional). RGB mapping ensures consistent rendering across PDF viewers.
- â–¸Selective Page Application: Apply watermark to All Pages, First Page Only (cover page branding), Odd Pages, or Even Pages. Useful for double-sided printing scenarios or selective marking.
- â–¸Layer Control: Background layer (watermark behind content, subtle) or Foreground layer (watermark on top, prominent). Background recommended for document readability preservation.
- â–¸HelveticaBold Font Embedding: Uses pdf-lib's embedded HelveticaBold for consistent cross-platform rendering. Professional sans-serif appearance suitable for business documents.
- ▸Client-Side Processing: All watermark rendering occurs in browser using pdf-lib. Zero network requests for document content—complete privacy for confidential watermarking.
Professional Use Cases
Copyright and IP Protection
Mark copyright ownership on design portfolios, photography portfolios, architectural plans, and creative works distributed for review or client presentation.
Document Status Indication
Mark documents as DRAFT, CONFIDENTIAL, SAMPLE, FOR REVIEW ONLY, or FINAL to indicate workflow status and prevent confusion about document versions.
Agency Client Deliverables
Brand agency reports, marketing decks, and strategic documents with agency name or client name watermarks for professional presentation and source attribution.
Educational Material Distribution
Watermark course materials, lecture slides, and study guides with institution name, instructor attribution, or semester designation for academic distribution control.
Legal Document Branding
Add law firm name, attorney contact, or document reference numbers to contracts, briefs, and legal correspondence for professional branding and tracking.
Internal Document Control
Watermark internal company documents with department name, security classification (INTERNAL USE ONLY), or distribution restrictions for compliance and audit purposes.