Merge Multiple Images

Sometimes it is necessary to merge multiple documents into a single file. Combining image files is particularly useful when digitizing paper documents — for example, when you have photographed or scanned individual pages and want to create a single, continuous PDF for easier viewing, sharing, or archiving.

Merge Multiple Images Before Saving to PDF

If you need to combine multiple images and save each image as a separate page in PDF, use the Merge method and the following code example:

Merger.Merge("DocumentOut.pdf", new string[] { "MultiFrameIn.tiff", "DocumentIn.png" });

You can also merge multiple images using Fluent API and the Create method:

Merger.Create()
    .From("MultiFrameIn.tiff")
    .From("DocumentIn.png")
    .To("DocumentOut.pdf")
    .Execute();

Merge Multiple Images Into One

You can also merge multiple images into one by arranging them:

• vertically
• horizontally
• or in a grid

Сustomize the layout to render multiple pages in a single output using the MultiPageLayout class.

The following code example shows how to combine multiple images into a single image, placing each image or frame in a grid layout:

ImageSaveOptions opt = new ImageSaveOptions(SaveFormat.Png);
opt.PageLayout = MultiPageLayout.Grid(2, 10, 10);
opt.PageLayout.BorderColor = Color.Black;
opt.PageLayout.BorderWidth = 1;

Merger.Create()
    .From("MultiFrameIn.tiff")
    .From("DocumentIn.png")
    .To("DocumentOut.png", opt)
    .Execute();