PDF Watermark
Add custom text watermarks to every page of your PDF
Upload PDF → configure watermark → generate and download
Tap to choose files or drag and drop a PDF here
Only .pdf files
12 business-grade fonts included — 6 Chinese (document standard) + 6 English (international standard).
48px
0.3
-45°
-90°0°90°
Features
- Precise Control — adjust size, opacity, rotation, and color.
- All Pages — watermark applied to every page automatically.
- Absolute Privacy — PDF processed entirely in your browser.
How It Works
Uses pdf-lib + fontkit to load the PDF and draw watermarks on every page. Includes 12 locally-loaded fonts — 6 Chinese (Hei/Song/Kai/FangSong for official documents) and 6 English (sans/serif/mono/signature for international business). Everything runs locally — your files never leave your device.