Secure Watermark

Text

Colour

📤 File

⚙️ Watermark settings

✍️ Custom text

📏 Text size

20px

🔍 Opacity

30%

🔄 Rotation

-45°

Working…

Document previewed

📄

Pick a document to preview it with the watermark

Page 1 of 1

📋 Licences and technologies used

🛠️ Open source libraries:

PDF-lib - MIT License (pdf-lib.js.org)
PDF.js - Apache License 2.0 (Mozilla PDF.js)
SheetJS - Apache License 2.0 (Excel/CSV processing)

🌐 Web standards:

Canvas API - W3C standard (image processing)
File API - W3C standard (file reading)
Web Workers - W3C standard (background processing)
Crypto API - W3C standard (security)

⚖️ Legal notices:

✅ Commercial use allowed for every technology listed
✅ 100% local processing
✅ Respect the copyright of the content you use