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Images to PDF

Images to PDF: convert JPG, PNG, HEIC and TIFF files

By DeckleUpdated

To turn images into a PDF, open the Deckle tool for their format: JPG to PDF, PNG to PDF, HEIC to PDF or TIFF to PDF. Add the images, put them in order, choose a page size and choose Create PDF. Each image becomes its own page, and a multipage TIFF gives one page per frame. Your image 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.

Find the right guide

You want to Start here
Put several photos into one PDF How to combine multiple JPGs into one PDF
Convert photos from an iPhone How to convert iPhone photos to PDF
Convert screenshots, charts or diagrams How to convert PNG to PDF
Save one screenshot as a PDF How to save a screenshot as a PDF
Turn a multipage TIFF scan into a PDF How to convert a multi-page TIFF to PDF
Send a photo of a letter or form as a PDF How to turn a photo of a document into a PDF
Keep receipts for expenses How to turn receipt photos into one PDF
Print images on A4 paper How to put images on A4 pages in a PDF
Keep every pixel sharp How to convert images to PDF without losing quality
Combine JPG, PNG and TIFF files How to convert a mix of image formats into one PDF
Build a portfolio How to make a portfolio PDF from images

If something went wrong, start with why a HEIC photo is sideways in the PDF, why a TIFF gave fewer pages than expected or why a HEIC file is not recognised.

One tool per format

Each image format has its own tool, and each tool accepts only its own format. This is deliberate: the formats are handled differently on the way into the PDF.

Format Tool What happens to the image
JPG / JPEG JPG to PDF Placed in the PDF byte for byte, with no re-compression, unless it is over the pixel limit
PNG PNG to PDF Stored losslessly; transparency is kept
HEIC / HEIF HEIC to PDF Decoded and saved as a high-quality JPEG
TIFF TIFF to PDF Every frame decoded and saved as a high-quality JPEG

If you add a file of the wrong type, the Create PDF button stays disabled and tells you which file to untick and that it belongs in its own format's tool. WebP, GIF, BMP and AVIF files are not supported. Save them as PNG or JPG first.

For a set that mixes formats, convert each group with its own tool and join the PDFs with Merge PDFs. Converting a mixed photo set walks through it.

The settings every image tool shares

The four tools use the same screen, so once you have used one you know them all.

  • Images to include. Every image you add is listed and ticked, numbered in page order. Untick an image to leave it out without closing it. Move it with the up and down arrows.
  • Rotate. The rotate button on a row turns that image 90° clockwise per click. The row shows the total turn.
  • Page size. Match each image makes each page the size of its image, one pixel to one point. Fit inside A4 puts every image on an A4 page, shrinking large images and centring small ones.
  • Orientation and Margin in points. Shown with Fit inside A4. Choose Portrait or Landscape, and a margin of None, Narrow (18 pt) or Standard (36 pt).
  • Output PDF name. Leave it blank and a single image keeps its own name, while several images become images.pdf.

Undo, Redo and Reset image options work on all of these until you choose Create PDF. For how the size choice plays out on real files, see image DPI and PDF page size.

What the PDF contains

Every ticked image becomes one page, in the order shown. A JPG, PNG or HEIC file gives one page; a TIFF gives one page per frame, so three TIFFs of four frames each give 12 pages. Deckle never puts two images on one page and never crops or enlarges an image.

The pages hold pictures, not text. A photographed letter or a scanned contract is not searchable, and you cannot copy words out of it. How separate images become pages explains the page model in more detail.

When the run finishes, the result screen says how many pages were created and from how many images, followed by a Verified line and the list of checks that ran: the new PDF reopens, every planned page is present and each page has the planned size.

Limits to know before you start

  • Pixel limit. Each page keeps up to 16 megapixels on a computer or Android device, and 4 megapixels on iPhone, iPad and devices with 2 GB of memory or less. A larger image is scaled down to fit, with its proportions and its page size kept, and the review lists each one before you convert. A scaled JPEG is re-saved at quality 90 without its EXIF data. Apple notes that on supported iPhone models the main camera saves 24-megapixel photos by default (Change advanced camera settings on iPhone); those convert everywhere, but keep about a sixth of their pixels on iPhone and iPad.
  • Largest image. Images above 64 megapixels on a computer or Android device, or 25 megapixels on iPhone, iPad and devices with 2 GB of memory or less, are refused before you start, and the disabled button names the file. A 48-megapixel photo converts on a computer but not on iPhone or iPad; there, switch Settings > Camera > Formats > Photo Mode to 24 MP or 12 MP.
  • PNG types. Animated, interlaced and 16-bit PNGs are refused. Re-save them as standard 8-bit PNGs.
  • HEIC with several images. A HEIC file holding more than one image, such as an image sequence, is refused before you start rather than reduced to one picture.
  • TIFF types. Uncompressed, LZW and Deflate TIFFs in greyscale, RGB or palette colour are read. Fax (CCITT), PackBits and JPEG compression, and CMYK colour, are refused.
  • TIFF page count. The number of frames in a TIFF is not shown before you convert. The result screen states how many pages were created.

Frequently asked questions

Can I convert images to PDF without uploading them?

Yes. Deckle builds the PDF in your browser, and the images are read from your device rather than sent to a server.

Can I put several images on one page?

No. Every image gets its own page. Choose Fit inside A4 if you want every page the same size.

Can I combine JPG and PNG files in one PDF?

Yes, in two steps. Convert the JPGs with JPG to PDF and the PNGs with PNG to PDF, then join the two PDFs with Merge PDFs in the order you want.

Does converting an image to PDF reduce its quality?

Not for JPG or PNG: JPEGs are copied unchanged and PNGs are stored losslessly. HEIC and TIFF images are re-encoded as quality-90 JPEG, which can soften very fine detail slightly.

Related tools

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