PDFJackal
PDF Copyright Protection
Share wisely — keep your rights to every document.
EN
RU
1. Upload PDF
Drag a PDF file here
One PDF file
Pages to process
Comma-separated pages, e.g. 1,5,13,24-47 (dash = inclusive range). Empty = all pages.
Remove unprocessed pages from the document
2. Watermark
Watermark enabled
Text
Image
Text
Font
Arial
Size, pt
Color
#888888
Tile gap: 40pt
Watermark opacity: 50%
Tilt angle: -30°
3. Rasterization
DPI (raster quality)
DPI only affects raster image quality. Watermark size does not depend on DPI. 50–1500, default 300.
4. Adversarial gradient (FGSM)
Raster perturbation via fast gradient sign method
5. Whitespace text
Add selectable text into blank gaps between lines
6. Password protection
Enable document protection
Obfuscate PDF
Live preview
Upload a PDF — a preview of the page with the current watermark and decoy text appears here. Settings on the left update the preview in real time.
PDFJackal — PDF Copyright Protection: защита авторства и безопасность PDF