How to Convert Multiple Images into One PDF
A step-by-step guide to combining several images into a single PDF document, including page size, orientation, and fit-mode choices.
Combining scanned pages, receipts, or photos into a single PDF is one of the most common everyday document tasks — for submitting assignments, expense reports, or application documents that require a single file rather than several separate images.
Step-by-step process
- Gather all the images you want combined, in JPG, PNG, or WebP format.
- Upload them in the order you want them to appear as pages — most tools let you reorder afterward if needed.
- Choose a page size. A4 is the standard for most documents; Letter size is more common in the US.
- Choose orientation — portrait for most documents, landscape for wide images like spreadsheets or panoramic photos.
- Choose a fit mode: contain fits the whole image within the page without cropping (may leave white space), while cover fills the entire page (may crop parts of the image depending on its aspect ratio).
- Generate and download the combined PDF.
Contain vs cover — which to pick
If the images are documents or receipts where cropping any content is unacceptable, use contain — you may get some white border, but nothing gets cut off. If the images are photos meant to fill the page edge-to-edge for a cleaner look, cover works better, accepting that parts of a differently-proportioned image may be trimmed.
Keeping file size reasonable
A PDF built from several high-resolution photos can get large quickly. If the resulting PDF needs to meet an email attachment or upload size limit, compressing the source images before combining them into a PDF is more effective than trying to compress the finished PDF afterward.
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Open Image to PDF Converter →Frequently Asked Questions
Can I combine images in different formats into one PDF?
Yes. JPG, PNG, and WebP images can typically all be combined into a single PDF regardless of their original format.
What's the difference between contain and cover fit modes?
Contain fits the entire image within the page without cropping, which may leave white space around it. Cover fills the entire page, which may crop parts of the image if its proportions don't match the page exactly.
How do I keep the combined PDF file size small?
Compress the individual images before combining them into a PDF, since compressing an already-assembled PDF is generally less effective than compressing the source images first.