Add Image Watermark to PDF Online Free: Logo Stamp
Stamp a logo or picture onto your PDF: drag to place, tile across pages, set opacity.
Brand contracts, proposals, and reports with a company logo, mark drafts with a picture stamp, or tile a translucent logo across every page to discourage reuse. Place the mark by dragging it on a live preview, the downloaded PDF matches the preview exactly.
How to Use It
- Upload your PDF and wait for the local preview to load.
- Adjust the settings: Adjust the available settings and run the tool locally in your browser.
- Download the result: Download the processed file directly to your device.
Frequently Asked Questions
What image formats can I use as a watermark?
PNG and JPG. A PNG with transparency works best for logos. The transparent background is preserved, so only the logo itself is stamped onto the page.
Can I repeat the logo across the whole page?
Yes. Enable Tile mode to repeat the mark in a grid across each selected page. Ideal for DRAFT or CONFIDENTIAL style branding.
Will the watermark land in the same place on every page?
Yes. Placement is stored relative to the page, so the mark sits at the same spot on every page you apply it to, even when page sizes differ.
Is my PDF uploaded anywhere?
No. Rendering and stamping run fully in your browser with pdf.js and pdf-lib. Neither the PDF nor your logo ever leaves your device.