Add Watermark
Stamp diagonal text across every page of your PDF.
Click to browse or drag & drop a file here
Select a single PDF file
🔒 Your files are processed entirely in your browser. Nothing is uploaded to any server.
How to watermark a PDF
Upload a PDF, type your watermark text (for example "CONFIDENTIAL" or "DRAFT"), choose the size, opacity, and color, then click Add watermark. The text is stamped diagonally across every page. All processing happens locally in your browser — your document is never uploaded.
Frequently asked questions
- Where does the watermark appear?
- The text is stamped diagonally across the center of every page, behind nothing — it overlays the content with the opacity you choose.
- Can I change the opacity?
- Yes. Lower opacity (10–20%) is subtle; higher opacity (35–50%) is more prominent. Pick what fits your document.
- Is my file uploaded?
- No. The watermark is applied entirely in your browser.