PDF Watermarker - PDFStamp

This app allows you to add watermarks to PDFs and save them as PDF or image (JPEG).
You can use all features for individual pages without needing to register or log in.

When sharing PDFs with clients or publishing them online, you can check metadata, annotations, and bookmarks. 
You can also decide whether to keep these elements during conversion.
All processes are done locally on your device, and no PDF or operation data is sent to our servers.


●Conversion Features

PDF → PDF
・Add watermarks *1
・Copy basic content
・Toggle metadata, annotations, and bookmarks transfer
・Adjust overlay watermark image quality (DPI)

PDF → JPEG
・Add watermarks *1
・Copy basic content
・Adjust output quality (DPI)

Watermark Details *1
・Single watermark
・Wallpaper watermark
・Adjust text color, size, density, and transparency


●DPI Recommendations

For PDF to image conversion:
150 DPI for text-only files
200 DPI for files with images

For PDF to PDF conversion with overlay watermarks:
150 DPI for text watermarks
200 DPI for image watermarks

You may increase the DPI for better results if the text uses anti-AI removal fonts or outline fonts, or if the overlay image is high-resolution.


●Free and Pro Plan Features

You can use all features for individual pages for free.
To process entire files or save multiple watermark patterns, you’ll need to upgrade to the Pro Plan.
The Pro Plan offers a 1-month free trial, so give it a try!