100% Client-Side — No Data Uploaded

PDF Watermark Adder

Add watermarks to any PDF right in your browser. No uploads, no signup, no subscription. Free forever.

vs Smallpdf

What You Get

Upload any PDF and add text watermark
Adjust font size, opacity, rotation, and color
Center, tiled (mosaic), or corners positioning
Live preview before you download
One-click PDF export — your files never leave your device
No signup, no account, no hidden fees
Works offline after first load
Free forever — no paywalls or watermarks on output

FAQ

Is my PDF uploaded to a server? No. Everything runs in your browser using pdf-lib. Your files never leave your device.

Does this work on mobile? Yes — just upload, customize, and download from any modern browser.

Is there a file size limit? Typical business PDFs work fine. Very large PDFs (50MB+) may be slow in the browser.

Can I watermark multiple pages? Yes — the watermark is applied to every page automatically.

How is this different from Smallpdf? Smallpdf requires an account for some features and uploads your files to their servers. This tool is free, private, and entirely client-side.

Upload a PDF to see preview