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Image Watermark
Add an image watermark to your PDF
What is Image Watermark?
Image watermarks — logos, stamps, or ownership marks — add a visual identifier to every page of a PDF. PDFStream overlays your image watermark with adjustable opacity and position.
Upload your watermark image (PNG with transparency works best), set the opacity and position, and apply to all pages. The original content shows through the semi-transparent overlay.
Use cases: adding a company logo watermark to client-facing documents, overlaying a SAMPLE or VOID stamp on form templates, marking proof copies with a visual identifier, or asserting brand ownership on distributed content.
How-to
- 1
Upload File
Select your PDF.
- 2
Upload Image
Upload the logo or stamp image to be used as a watermark.
- 3
Adjust & Download
Adjust position and opacity, then download the PDF.
Practical tips
Use a transparent PNG logo
A PNG with a transparent background blends naturally instead of showing a white box around the logo.
Lower opacity for documents
Set the logo light enough that body text and figures remain easy to read.
Position consistently
Place the logo in the same spot on every page to create a recognizable branded document.
Frequently Asked Questions
What image formats can I use as a watermark?▼
You can use PNG (supports transparent backgrounds), JPG, or WebP.
Does a transparent PNG logo work well?▼
Yes, transparent background PNGs are inserted most naturally.
Is the file saved on the server?▼
No, all processing is local.
Last Updated: August 6, 2026
