Combine PNG images into one PDF

Each PNG becomes exactly one PDF page. Two images never share a page, and one image is never split across two pages. If a page should contain several pictures, place them side by side in an image editor first and export that as one PNG.

Page 1 of the PDF is the first row of the queue, page 2 is the second, and so on. You can drag a row to a new position, use the move buttons on each row for the same result without a mouse, or reverse the whole queue in one click.

Sort by name applies natural sorting, which compares numbers as numbers: page-2.png comes before page-10.png, where a plain alphabetical sort would put page-10 first. Rotation and removal never reshuffle the remaining rows, so the order you set survives edits.

The file name field sets the name of the combined PDF; the .pdf extension is added for you. Characters that operating systems reject in file names are replaced, so an odd name cannot produce a file you cannot save.

If you choose a separate PDF for each image, every PDF is named after its image and the set is downloaded as one ZIP file. That is the better choice when the pages are really separate documents that happen to be prepared together.

A4 and US Letter give every page the same fixed size, which is what most recipients expect from a document. Original image size instead gives each page the physical size of its image, so a set of scans keeps its proportions.

Margins create a quiet border around the image. Fit shows the whole image inside that border and keeps its proportions; crop to fill makes the image cover the page area and cuts off the overflowing edges. The preview panel shows which of the two you will get.