ToolKitSphereAdd Watermark
Files never leave your browserStamp repeating or single text/image watermarks across PDF pages.
One file · up to 100.0 MB · or press Ctrl+V to paste
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Configure and preview your watermark
Stamp repeating or single text/image watermarks across PDF pages.
One file · up to 100.0 MB · or press Ctrl+V to paste
Configure and preview your watermark
Combine multiple PDFs into one file, in the order you choose.
Pull specific pages or ranges out of a PDF into separate files.
Shrink PDF file size with Low/Medium/High presets and see real savings.
Add text, shapes, and freehand marks directly on rendered PDF pages.
Password-protect a PDF with real RC4-128 encryption.
The **Add Watermark** tool offers a secure, browser-native solution for processing your PDF files. Unlike server-side converters that transmit sensitive files over remote networks, our platform executes 100% of tasks client-side using JavaScript and WebAssembly. Enjoy complete privacy, zero queue delays, and uncompromised document quality without subscription fees or account signups.
No. All operations for Add Watermark take place locally in your web browser. No files are uploaded to our servers.
Yes, Add Watermark is 100% free with unlimited usage and no hidden fees or account registration.
Yes! You can use Add Watermark on smartphone and tablet browsers without installing any mobile app.