How to Combine Images Into a PDF
One image per page, in the order you set. Two decisions, and one thing that catches people out.
Checked August 6, 2026
The short answer
Drop the images in, put them in order, choose whether each page should be A4 or should take the size of the image, and download one PDF. Photos of receipts and scans of paperwork are what this is for, and the reason it has to be a PDF is that most places accepting documents will not accept a folder of JPEGs.
The decisions, and the one surprise
| Choice | What you get | Pick it when |
|---|---|---|
| A4 page | Each image centred on an A4 sheet, scaled down to fit | Anything that will be printed, or submitted where a page is expected to be a page. |
| Match the image | Each page takes its image’s own dimensions | Screenshots and scans that should not gain a white border. |
| Order | The list you arrange | Always worth checking. File names sort in ways nobody intends. |
| A transparent PNG | Composited onto white | A PDF page has nowhere to put transparency, so it has to become some colour. |
One image per page, always. Several pictures arranged on one sheet is a layout job rather than a conversion, and it belongs in something that does layout.
A4 or match the image
This is the only real decision. An A4 page puts each picture on a standard sheet with white space around it, which is what you want when a human will print it, or when you are submitting it somewhere that expects a page to be a page.
Matching the image gives each page exactly the shape of its picture. That is what you want for screenshots, where a white border around the edge reads as a mistake, and for scans that are already the right shape.
Order comes from the list, not the file names
Photographs off a phone are named by counter or by timestamp, and scanners name by whatever they name by. Alphabetical order puts image10 before image2. Arrange the list and read it back before downloading, because fixing the order afterwards means doing the whole thing again.
Transparency has to become a colour
A PNG with a transparent background cannot stay transparent on a PDF page. Something has to be behind it, so it is placed on white. That is deliberate rather than lazy: left untouched, a transparent PNG lands as black in some readers and white in others, and a document that looks different depending on who opens it is worse than one that made a choice.
If you wanted a different colour behind it, put the colour there first and then convert.
Why a phone photo sometimes lands sideways
Phone cameras often record the picture one way up and attach a flag saying which way it should be displayed. Your photo viewer honours that flag. Not everything further down the chain does, which is how a photo that looks right in your gallery arrives rotated inside a document.
When it happens, the fix is a quarter turn on the page rather than anything to do with the image, and it takes a moment in the PDF rotator.
Doing it without uploading
The conversion runs in the tab. Receipts, payslips, passports and letters from a doctor are the usual contents of a stack of images headed into a PDF, and none of them are sent anywhere here.
More guides
- How to Merge PDF FilesJoin documents end to end in the order you choose. What survives the join, and what does not.
- How to Split a PDFTwo different jobs share the word split. Work out which one you want first.
- How to Rotate a PDF and Save ItRotating the view and rotating the file are different things. The first one snaps back.
FAQ
- How do I put multiple images into one PDF?
- Drop them all in at once, arrange the order, choose A4 or match the image, and download. One image becomes one page.
- Can I put more than one image on a page?
- Not here. That is a layout decision rather than a conversion, and doing it properly means choosing margins and positions, which belongs in something built for layout.
- Does it work with PNG as well as JPG?
- Yes. A transparent PNG is composited onto white first, because a PDF page has nowhere to put transparency.
- Why is my photo sideways in the PDF?
- Because the camera stored an orientation flag instead of rotating the pixels, and not everything honours it. Rotate that page in the PDF and save, which takes a few seconds.
- Will the images lose quality?
- A JPEG is placed into the page as it is wherever possible, so it is not re-encoded. What does change is the size on the page: choosing A4 scales the picture to fit the sheet, which is a display size rather than a loss of pixels.
- Is anything uploaded?
- No. The images are read by the page and the PDF is built in your browser.
Build one from a stack
Any number of images, in the order you choose. Nothing is uploaded.
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