Add Watermark to PDF Online
Protect your PDF with a custom text watermark. Customize the text, font size, opacity, and rotation angle. Live preview before applying.
Upload PDF to Watermark
Click or drag & drop
Professional PDF Watermarking
Add watermarks with full customization and live preview
Custom Watermark
Set your own watermark text — CONFIDENTIAL, DRAFT, your company name, or any custom text.
Full Control
Adjust font size, opacity (0-100%), rotation angle, and color to match your needs.
100% Private
Watermarking runs entirely in your browser. PDFs are never uploaded to any server.
FAQ
Yes — a live preview shows how the watermark will look (text, angle, opacity) before you apply it to the full document.
Yes — adjust opacity from 5% (very subtle) to 100% (fully opaque). A typical value is 20-40% for a professional subtle watermark.
Yes — the watermark is applied to every page of the PDF in one operation.
Yes — set any angle from -90° to 90°. The classic 'CONFIDENTIAL' watermark uses 45° diagonal placement.
This tool currently supports text watermarks only. For logo watermarks, convert your logo to a PDF page first via our Image to PDF tool, then merge it.
Yes — use our Add Page Numbers tool after watermarking to combine both effects on your PDF.
Related Tools
Other PDF tools you may find useful
Add Watermark to Your PDF Now
Free PDF watermark tool — no signup, instant download.