Watermark PDF
Add text or image watermarks to PDFs. Live preview. Browser-only.
Drop files here
or click to browse · paste from clipboard
Accepts .PDF · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Choose settings
Adjust quality, format, and other options to match your needs.
Click Convert
Everything runs in your browser via WebAssembly. Watermark PDF happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
Text watermarks use a built-in font and let you set the color, size, and rotation. Image watermarks use a PNG or JPG you upload — PNGs with transparency work well for logos.
Yes. Upload a PNG file with a transparent background as the image watermark. The transparency is respected in the output PDF.
"Above content" places the watermark on top of the page — always visible. "Behind content" places it underneath, so it shows in empty areas but may be obscured by existing page content.
Currently you can apply to all pages or the first page only. Per-page range selection is on the roadmap.
No. The watermark is added as a visual layer. Existing text in the PDF remains fully searchable.
Never. All watermarking runs in your browser using WebAssembly. Your PDFs never leave your device.