Add PDF watermark
Mark your PDF with text or an image of your own.
Drag and drop a PDF file hereChoose a PDF file from your device
One file up to 100 MB. The file stays on your device.
Processed on your device, no upload
Guide and details
How it works
- Choose a PDF.
- Check settings and pages.
- Create the PDF and download the checked result.
Features and controls
The default is diagonal text centered on the page with reduced opacity. Adjust font size, color, angle and horizontal and vertical placement. PNG and JPG files are checked and reencoded locally, preserving orientation and proportions. Apply the mark to all or selected pages and choose foreground or background. The chosen size is a maximum. Marks shrink proportionally on smaller pages and text below 6 pt is rejected. Opaque page content can cover background marks.
Processing and limits
Your PDF stays entirely on your device. Scripts, automatic actions and attachments are sanitized. Every output is checked again for prohibited active content before download. Encrypted PDFs are rejected with an explanation. Editing removes digital signatures; they do not remain valid unchanged.
Up to 100 MB and 2,000 pages, or 50 MB on smaller devices. Previews are limited for large files. Browsers may reach their memory limits earlier. Page sizes and existing rotations are preserved. Rebuilding pages does not preserve form fields or bookmarks.
Frequently asked questions
Can I put a watermark behind the content?
The default is diagonal text centered on the page with reduced opacity. Adjust font size, color, angle and horizontal and vertical placement. PNG and JPG files are checked and reencoded locally, preserving orientation and proportions. Apply the mark to all or selected pages and choose foreground or background. The chosen size is a maximum. Marks shrink proportionally on smaller pages and text below 6 pt is rejected. Opaque page content can cover background marks.
Do my documents stay private?
Yes. Every step runs locally in your browser. Document contents are never uploaded.
Which characters can I use?
Helvetica supports Western European characters. Unsupported characters are rejected with a message. Use an image in the watermark tool for other scripts.