Add Watermark to PDF Online
Embed custom text watermarks onto PDF pages. Files are processed locally in your browser.
How to Add Watermark to PDF Online
Choose Document
Choose the target PDF document from your local storage directory.
Enter Watermark Text
Type your overlay text. Configure font size scale, opacity percentage, and rotation.
Inject Watermark
Click Add Watermark. PixoPDF computes placement ratios and draws overlays in browser memory.
Download
Save the resulting document instantly onto your local computer or phone.
Private Browser-Side PDF Watermarking
Unlike online tools that process file contents by uploading them onto cloud platforms, PixoPDF implements every step locally. No watermark text, filenames, or PDF files are transmitted over the network, guaranteeing offline data confidentiality.
Frequently Asked Questions
Does PixoPDF add its own branding to my PDF?
No. PixoPDF operates as a genuinely free suite. We never embed watermarks, stamps, or promotional text headers into your output documents.
Can I rotate the watermark diagonal?
Yes. You can configure rotation presets (0°, 45°, -45°, or 90°) to position text diagonally across your document pages.