OmniFile Studio

Watermark PDF

Add a diagonal text watermark to every page with custom size, angle and opacity.

100% Client-Side · Zero-Server-Upload · 100% Private

Drop files here or tap to browse

Files are processed locally with Web Workers. Max recommended size 100 MB.

Options

How it works

  1. 1Drop a PDF file.
  2. 2Type your watermark text and tune the style.
  3. 3Process and download the watermarked PDF.

Are my files uploaded to a server?

Never. Every tool runs inside your browser using WebAssembly and Web Workers. Your files stay on your device and are wiped from memory as soon as you download the result.