Watermark
Stamp text or a transparent logo/image over your PDF.
Runs in your browser (WebAssembly)
Zero server storage
Your files are never written to disk.
In-memory processing
In-Memory Stream / Client WASM: processed in your browser's memory.
100% privacy & security guarantee
No server uploads; your files are never shared with anyone. How it works
Mark your documents with a text such as "CONFIDENTIAL" or "DRAFT", or with your company logo. Adjust opacity, angle and position, repeat the watermark across the page as a mosaic or place it under the content. The original text stays selectable and searchable.
How to add a watermark to a PDF
- Choose your PDF.
- Choose a text or image watermark and set opacity, angle, position and layer.
- Press "Add watermark" and download the watermarked PDF.
Frequently asked questions
Can I use my logo as a watermark?
Yes. Upload a PNG or JPG image; transparent PNGs stay transparent and you can set the opacity as well.
Can a watermark be removed later?
The watermark is added to the page content and can be removed with PDF editors. For strong protection, also encrypt the PDF.
Are special characters shown correctly?
Yes. The font is embedded in the PDF, so characters such as ğ, ü, ş, ı, İ, ö, ç and ₺ look right on every device.