How do I combine multiple images into one PDF?

Open OptaPDF JPG to PDF, upload all your images at once, arrange them in the order you want, choose a page size, and download a single PDF containing every image as its own page. It is free, needs no sign-up, and adds no watermark.

Can I convert phone photos or scans into a PDF?

Yes. Photograph or scan each page with your phone, then upload the JPG or PNG files to JPG to PDF. They are combined into one tidy PDF — a great free alternative to a scanner app for receipts, forms, and documents.

Can I control the order and page size of the images?

Yes. You arrange the images before converting, and you can choose Auto (match each image), A4, or US Letter page size, plus portrait or landscape orientation.

Does combining images into a PDF reduce their quality?

No, the images are embedded at their original resolution. If the resulting PDF is large, you can shrink it afterward with Compress PDF.

PDF How-To Guides

How to Combine Multiple Images (JPG/PNG) into One PDF — 2026

By The OptaPDF Team • Published July 13, 2026 • 5 min read

Receipts, a multi-page form you photographed, screenshots, ID scans — loose images are a hassle to send. Combining them into one PDF makes a clean, ordered document that opens the same on every device.

How to combine images into one PDF

Open JPG to PDF and upload all your images at once (JPG or PNG).
Arrange them in the order you want — each image becomes one page.
Choose a page size (Auto, A4, or US Letter) and orientation.
Process and download a single PDF containing every image.

Turning phone photos or scans into a PDF

You do not need a scanner or a paid scanner app. Photograph each page with your phone, transfer the images, and upload them to JPG to PDF. The result is one tidy PDF — perfect for receipts, signed forms, or a stack of documents. For the sharpest result, shoot in good light with the page flat and filling the frame.

Can I control order and page size?

Yes. Arrange the images before you convert so the pages land in the right sequence, and pick the page size that fits your use: Auto matches each image's own dimensions, while A4 or US Letter gives you a standard printable document.

After you combine

Photos from a modern phone are high-resolution, so an image-heavy PDF can get large. If yours is too big to email, run it through Compress PDF. Need to add more pages from another PDF later? Merge PDF stitches multiple PDFs together.

The takeaway

To merge photos, scans, or screenshots into one document, use JPG to PDF — free, ordered, quality-preserving, with no watermark. Pair it with Compress PDF and Merge PDF to finish and share.