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Dev.to
7/23/2026
The original title is "How to Add Watermarks to PDFs in the Browser with Vue 3 and pdf-lib"

The original title is "How to Add Watermarks to PDFs in the Browser with Vue 3 and pdf-lib"

Original: How to Add Watermarks to PDFs in the Browser with Vue 3 and pdf-lib

Short summary

A practical tutorial for building a fully browser-based PDF watermarking tool using Vue 3, pdf-lib, and PDF.js. The approach processes files locally, avoiding server uploads and preserving privacy. The post covers text rendering, rotation math for centering watermarks, multi-page support, and configurable settings for font size, opacity, rotation, and color.

  • •Browser-based PDF watermarking with Vue 3 and pdf-lib keeps files local for privacy
  • •Covers rotation math for centering text, multi-page support, and configurable settings
  • •Includes full code examples for file handling, watermark application, and download

Generated with AI, which can make mistakes.

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