Merge Multiple JPG/PNG into PDF - Guide for Invoice Archiving and Document Submission

For daily office reimbursement, most enterprises require scattered invoices to be organized into a single PDF file for submission. Most individual invoices are JPG or PNG format photos taken with mobile phones, and merging them facilitates unified upload and archiving.

When submitting job applications or processing government affairs, applicants often need to integrate multiple document images such as ID cards and academic certificates into a single PDF, as some platforms only accept single-file attachment submissions. Design practitioners can also merge separate PNG previews of multi-page design drafts into a PDF to send to clients.

This tool generates PDF in the order images are uploaded, with each image occupying a separate page. Renaming images according to the required order before upload allows you to control the final page order of the PDF. Numbering formats such as 001, 002 are recommended for renaming.

Vertically captured JPG images from mobile phones record shooting orientation in EXIF information. This tool supports automatically reading EXIF orientation information and correcting image display direction, so output PDF will not have the misalignment issue of vertically captured photos displayed horizontally.

The lossless embedding mode does not modify the original pixel information of images, it only encapsulates the original image data into a PDF container, and can completely retain the original clarity of the images.

The recompression mode re-encodes image pixels, and allows adjusting the compression ratio to change the final file size of the PDF, which is suitable for online submission scenarios with file size requirements.

This tool provides two common fixed page size specifications: A4 and Letter. After selecting the corresponding specification, all images will be adapted to the PDF page of the corresponding size, and you can directly output a document that meets printing requirements.

Users can customize the margins on all four sides of the page to avoid the cutting range of printers, and also meet the mandatory margin requirements of some submission platforms. Images will be automatically centered and adapted to the available area after margins are applied.

This tool supports merging up to 30 images in a single process, which meets the single-file requirements of most individual users for daily office work and business processing. If the number exceeds the limit, you can split the images into multiple tasks and process them separately.