Imgtools Utility LabPDF / Image Watermark & Stamping
Upload a watermark or seal asset — a transparent PNG works best — drag it into place on the preview, resize freely using the eight border handles, and set the opacity. Duplicate the watermark as many times as you need; on export every coordinate is applied to each page of the PDF.
PDF / Image Watermark
Drag watermark(s) to move, use the 8 border handles for free resize (non-uniform supported), duplicate as needed, and export applies all coordinates to every page.
Key features
- Drag to position with eight-handle free resizing, including non-uniform scaling
- Duplicate watermarks and stamp all pages in a single export
- Supports PDF, PNG, JPG and WEBP with no file uploads
How to use
- Upload one or more watermark or seal assets
- Upload the PDF or image you want to stamp
- Position, resize and adjust the opacity
- Generate and download the finished file
FAQ
Is the watermark applied to every PDF page?
Yes. On export each watermark coordinate you set is applied to all pages, and the page count is shown in the hint below the preview.
What kind of watermark asset should I use?
A transparent PNG is recommended so the underlying document stays readable. JPG also works but carries a white background.
Is the output secure?
Yes. Both the asset and the target file are processed in browser memory and never uploaded.
Privacy First: Files are processed locally in your browser and never uploaded to our servers, keeping your data 100% private.