How to add a logo or image to a PDF

Prepare the right image

PNG preserves transparency and avoids a background rectangle. JPG suits photographs with a full background. WebP converts locally with a white background; do not assume transparency survives.

Crop empty space around the logo and avoid blurry screenshots. Check the image’s identity and version; do not repeat unnecessary personal information across every sheet.

Choose readable placement

A corner is usually less intrusive than the center. A width of 20% to 30% can suit a horizontal logo. Check that it does not overlap headings, page numbers, signatures or QR codes.

For a central watermark, try 20% to 40% opacity. A small corner image may work at higher opacity, after reviewing its background contents.

Application and limits

Supported PNG, JPG and WebP images may be up to 25 MB, with five positions, widths from 10% to 70% and opacity from 10% to 100%. Image height is also limited to avoid overflowing the sheet.

1. Finalize PDF order, orientation and numbering first.
2. Load the document and image.
3. Leave pages blank for all or enter a selection such as 1,3,5-8.
4. Adjust position, width and opacity, then inspect several downloaded sheets.

A logo is not a digital signature

An image communicates identity or status but does not prove integrity or authorship and cannot prevent edits. Preserve the original and use the appropriate signature mechanism when required.

PDF and image processing is local. Check forms, links, annotations and signatures, especially in complex or previously signed documents.

Criteria for reviewing and delivering the result

Prepare the graphic with only the necessary outside space. A large transparent margin can make the visible symbol look small even when file dimensions are large. Check white lettering versus transparent regions and their appearance against page backgrounds. For brand work, retain a source with enough resolution or an export suitable for the intended size before placing it in the PDF. Image preparation makes later scale and positioning decisions easier.

Try the mark over text and over an image. Inspect clarity, edge clearance and obscured information. Add dedicated margin space first when required, then check document features after reconstruction. A visible stamp is not a digital signature or independent proof of authorization. Keep the graphic, scale settings and unmarked PDF to repeat treatment across a collection. When the logo changes, generate from that source without placing the new graphic over an earlier one. Open the final PDF at reading size and confirm small brand details remain recognizable. A visually consistent collection depends on repeatable source preparation and inspection, rather than merely applying the same numeric size to unrelated graphics.