Does Watermark PDF work on mobile?

Yes. The interface is responsive for desktop, tablet and mobile screens.

PDF tool

Add text or image watermark to PDF

Yes. The tool page is designed for free online use.

Place a watermark behind or above page content with adjustable position and opacity.

Browser workspace PDF Fast front-end workflow

Choose PDFThe browser workspace prepares this task instantly.

Select a file to start.

Details

The page is focused on one conversion task with clear upload, action and result areas.

Each tool keeps the controls simple so users can start quickly on desktop or mobile.

The backend can support heavier processing as more users and file tasks are added.

Is Watermark PDF free to use?

Yes. The page is designed as a free online tool. Server tools depend on the VPS packages installed for processing.

Will this work on mobile?

The interface uses responsive layouts, large upload areas and readable controls for desktop and mobile screens.

Are files stored permanently?

The package stores temporary uploads and outputs in the protected storage folder. Set a server cleanup cron for production traffic.