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Images to PDF

How to combine multiple JPGs into one PDF

By DeckleUpdated

To combine multiple JPGs into one PDF, open JPG to PDF, add all the JPG files at once, put them in order with the arrows and choose Create PDF. You get a single PDF with one page per JPG, in the order of the list. Each photo is copied into the PDF without re-compression, and your JPG files are not changed.

JPG to PDF

Choose a source for the job

Photograph

Inspect colour and detail

Diagram

Inspect lines and labels

Scan

Inspect frames and text

A static PDF page does not preserve motion

Conceptual illustration · image format and output page behaviour are separate decisions.

How to combine JPG files into one PDF with Deckle

  1. Open JPG to PDF and choose Select files. Select every JPG you want in the PDF, or drop them all onto the page together.
  2. Check Images to include. Every JPG is ticked and numbered: number 1 is the first page.
  3. Put the images in order. Use the up arrow on a row to move it earlier and the down arrow to move it later.
  4. Untick any image you want to leave out. It moves to Also open in this tab, where you can tick it again.
  5. Choose a Page size: Match each image for pages the size of each photo, or Fit inside A4 for equal, printable pages.
  6. Type a name in Output PDF name, or leave it blank to save as images.pdf.
  7. Choose Create PDF and download the PDF.

The result screen says how many pages were created and from how many images, such as "24 pages" created from 24 images.

Put the JPGs in the right order

The PDF follows the list, top to bottom. It does not sort by file name or by the date the photo was taken, so check the list before you convert.

Two habits save time:

  • Select in order. Files usually arrive in the order your file picker hands them over, which is often alphabetical. Naming files 01, 02, 03 before adding them gives you a sensible starting order.
  • Move the outliers. The arrows move an image one place at a time, which is quick when only a few images are out of place.

For a long set where many pages need moving, convert first and then reorder in Organize PDF pages, which lets you drag thumbnails or send a page straight to a numbered position. See how to reorder pages in a PDF.

Example: a 30-photo property inventory. Add all 30, move the front-of-house photo to position 1, check the room order in the list, then convert. Any photo still in the wrong room can be moved in Organize PDF pages afterwards.

Same size pages or one page per photo size

Choice What you get Good for
Match each image Each page is exactly its photo's size, one pixel to one point Viewing on screen, photo sets of mixed shapes
Fit inside A4 + Portrait Every page is A4; large photos shrink to fit, centred Printing, attaching to forms and reports
Fit inside A4 + Landscape Every page is landscape A4 Wide photos, panoramas, slides

With Fit inside A4 you can also add a margin: None, Narrow (18 pt, a quarter inch) or Standard (36 pt, half an inch). Press Preview on any row to see the photo on its page before you convert. How to put images on A4 pages covers the A4 choices in more depth.

Quality and file size

JPG to PDF places each JPEG in the PDF byte for byte. The photo is not decoded or saved again, so there is no quality loss and the PDF is roughly the size of the JPGs added together. Twenty 3 MB photos give a PDF of about 60 MB. The exception is a photo over the device's pixel limit, which is scaled down and re-saved as a high-quality JPEG (quality 90); the review lists any such photo before you convert.

If that is too large to email, reduce the photos before converting, for example by exporting smaller copies from your photo app. Choosing Fit inside A4 does not make the file smaller: the photo is drawn smaller on the page, but all of its pixels are still there.

Tips

  • Check orientation in Preview. Deckle reads the camera's orientation tag, so upright photos stay upright. If one is still sideways, press its rotate button.
  • Remove location data if you will share the PDF. A JPEG within the pixel limit is copied as it is, so any GPS location stored in it travels into the PDF. Only a scaled photo is re-saved without it.
  • Mind the pixel limit. Each page keeps up to 16 megapixels on a computer or Android device, but only 4 megapixels on iPhone and iPad; larger photos are scaled down to fit. A 24-megapixel photo from a recent iPhone converts everywhere, but keeps about a sixth of its pixels on iPhone and iPad, so convert on a computer for more detail. A 48-megapixel photo is refused on iPhone and iPad.
  • Use Undo freely. Undo, Redo and Reset image options cover order, rotation and page settings until you convert.

Other ways to combine JPGs into a PDF

  • Finder on a Mac. Select the JPGs in the order you want, Control-click and choose Quick Actions > Create PDF. Apple says files appear in the order you select them: Combine files into a PDF on Mac.
  • Merge existing PDFs. If some of the photos are already PDFs, convert the rest and join them in Merge PDFs.

Frequently asked questions

Is there a limit to how many JPGs I can combine?

You can select or drop up to 100 files at a time. Photos over the device's pixel limit are scaled down, photos above 64 megapixels (25 megapixels on iPhone and iPad) are refused, and very large batches are bounded by the memory your browser can use.

Can I combine JPG and PNG files?

Not in one run. Convert the PNGs with PNG to PDF, then join both PDFs in Merge PDFs.

Does combining JPGs into a PDF reduce quality?

No. The JPEG data is placed in the PDF unchanged.

Can I put two photos on one page?

No. Every JPG becomes its own page.

Related tools

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