PDF tools / Edit PDFs

Add watermark

Stamp angled, translucent text across every PDF page. Everything stays on your device.

Drop a PDF file here

or click to choose a file

How it works

  1. Choose a PDF file.
  2. Set the options, then select “Add watermark”.
  3. Download the result directly from your browser.

Private by design

The file is read and processed by this page on your device. It is never uploaded to FormatOtter or handed to a third-party conversion service. Large documents may take a moment because your browser is doing the actual work.

Related PDF tools

  • Rotate PDFRotate every page or a selected set of pages clockwise.
  • Add page numbersStamp configurable page numbers onto a PDF.
  • Crop PDFCrop page edges by exact point measurements.