watermark_to_pdf

https://github.com/Junaid0118/watermark_to_pdf

WatermarkToPdf is a Ruby gem that allows you to add text-based watermarks to PDF files. It uses the MiniMagick library to process PDF pages as images, apply customizable watermark text, and then converts the watermarked pages back into a single PDF. The gem supports setting different watermark text, font, size, position, and color for each page, providing a flexible solution for adding professional watermarks to your PDF documents.