PDF Watermark Tool — Stamp Every Page with Custom Text
Batch-watermark PDF pages in-browser, full Unicode and CJK support
Click to upload or drag PDF file here
Free online tool to add a text watermark to every page of a PDF. Customize font size, color, opacity, rotation, and tile spacing. Everything runs locally — great for marking contracts before signing or labeling internal documents. Full CJK (Chinese, Japanese, Korean) support included.
How to watermark a PDF
- 1
Upload your PDF
Click the upload area or drag a PDF onto the page.
- 2
Configure the watermark
Enter watermark text and tweak font size, color, opacity, rotation, and spacing.
- 3
Apply and download
Click the apply button; the watermarked PDF downloads automatically.
Frequently asked questions
Is CJK (Chinese/Japanese/Korean) text supported?
Yes. An embedded CJK font subset renders non-ASCII watermarks correctly.
Are PDFs uploaded?
No. Watermarking runs in your browser; files are never sent to any server.
Will the watermark cover the original content?
It overlays the original content. Adjust opacity to balance visibility and readability.
Can I add image watermarks?
Not yet — only text watermarks for now. Image watermark support is planned.