PDF to Long Image Converter

How long can a PDF to long image result be?

On a computer the long image can be up to 32,000 pixels tall and 64 megapixels in total; on a phone or tablet the limit is 16,000 pixels and 16 megapixels. When the selected pages add up to more, the whole image is scaled down evenly: every page keeps its proportions and nothing is cut off.

As a guide, an A4 page at the default 150 DPI is 1,240 × 1,754 pixels, so about 18 pages stay at full size on a computer and about 7 on a phone. For longer documents, select fewer pages or make one image per section with page ranges. Once the image has been scaled down, a higher DPI adds no sharpness — it only takes longer.

Pages of different sizes: how is the width decided?

All selected pages are resized to the width of the widest one. If a portrait document contains a single landscape page, the whole image takes the landscape width and the portrait pages are enlarged to match, so their text can look softer. In that case, deselect the landscape page or convert it on its own.

One long image or one image per page?

A long image is a single file: easy to send, and people read it by scrolling. It suits short documents that will be read on a phone. For many pages, or pages people need to zoom into, choose “One image per page”: each page keeps its own resolution and several pages download as a ZIP. For ordinary page-by-page images, use PDF to JPG.