Sending multiple image files is messier than it needs to be. The recipient gets a pile of attachments to open individually, the order isn't guaranteed, and some platforms compress or reorder images in transit. Combining them into a single PDF solves all of this — one file, fixed page order, consistent presentation on every device.
Portimg's image to PDF tool merges as many images as you need into a single document, in whatever order you arrange them. Here's how to use it well.
The conversion process
Go to portimg.com/image-to-pdf, upload your images — JPG, PNG, and WebP are all supported — arrange them in the order you want the pages to appear, and click Convert. The PDF downloads within seconds. No account required, and files are deleted from the server after processing.
Page order is the one thing worth getting right before you click Convert. If you're uploading a batch of files, naming them sequentially before uploading — 01.jpg, 02.jpg, 03.jpg — ensures they import in the correct sequence automatically. If the order needs adjusting after upload, drag the thumbnails into position before converting.
Settings worth considering
Page size. "Fit to image" sizes each PDF page to match the dimensions of the corresponding image exactly — no white borders, no cropping. This works well for photos and designs where you want the image to fill the page. "A4" or "Letter" forces standard document dimensions, which is better when the PDF will be printed or submitted alongside other documents where consistent page sizes matter.
Orientation. Set portrait for most document scans and vertical images, landscape for wide images, screenshots, or anything that's wider than it is tall. A mixed batch — some portrait, some landscape — is worth sorting before uploading if the output needs to look consistent.
Image resolution. Use the highest resolution originals you have. The PDF output reflects whatever you put in, and compressing the PDF afterward is far easier than trying to recover sharpness from a low-resolution source image.
Common situations
The most frequent use case is document submissions — job applications, college forms, visa applications, insurance claims — where multiple scanned images need to be combined into one file. A scanned ID front and back, a series of photographed certificates, a set of supporting documents that belong together: all of these become one clean PDF instead of a folder of attachments.
Portfolios are another common case. Whether it's design work, photography, academic projects, or creative work, a PDF portfolio is more professional to send and easier to page through than a ZIP of images. The order and layout stay exactly as you set them.
For expense reporting and financial records, a batch of receipt photographs merged into one monthly PDF is considerably easier to file, share, and find later than individual image files. It also compresses well — running the merged PDF through Portimg's PDF compressor afterward usually reduces the file size significantly if the source images were high resolution.
If you need to go the other direction
If you need to convert a PDF back into individual images — to use pages as thumbnails, embed them in a presentation, or feed them into an OCR tool — Portimg's PDF to image converter handles that in the same browser. Each page becomes a separate image file, downloadable individually or as a ZIP.