PDF Tools·3 min read

HEIC to PDF: Sending iPhone Photos as One Document

The insurance portal wants a single PDF of the receipts, and your iPhone saved every photo as HEIC, a format the portal has never heard of. HEIC is Apple's space-saving camera format, and outside Apple devices it is often unreadable. The HEIC to PDF tool decodes those photos in your browser and puts them into one PDF, one photo per page, without an app and without uploading anything. This guide covers why HEIC exists, how the conversion works, and the settings that make portals and printers happy.

Open the free HEIC to PDF Converter All insights

Why iPhone photos arrive as HEIC

Half the size, a fraction of the support.

Since iOS 11, the iPhone camera saves photos in HEIC by default. The format stores a photo in roughly half the space of a JPG at similar quality, which matters when a phone holds thousands of pictures. Apple's own apps handle it without anyone noticing.

The trouble starts when a photo leaves the Apple world. Windows often needs an extra codec, many Android galleries show a blank tile, and most upload portals accept JPG, PNG or PDF only. A PDF is the most widely accepted of those, and it can hold every page of a document in one file. Emailing the photos directly has its own problem: some mail apps convert HEIC to JPG on the way out and some do not, so the recipient may get a mix of files they can and cannot open.

What the converter does with each photo

Decode once, place on a page.

Browsers cannot read HEIC on their own, so the tool loads a decoder the first time you add a HEIC file and converts each photo to a high-quality JPEG in your browser. That takes a moment for large photos, and a thumbnail appears when each one is ready. JPG, PNG and WEBP files can join the same list.

When you press Convert to PDF, each photo becomes one page. PDF files cannot contain HEIC data, so the photos are stored as JPEG inside the PDF, which every reader can display. Nothing is sent to a server during either step, which matters for photos of IDs, bank cards and medical letters. If any photo comes out sideways, its rotate buttons turn it the right way.

Page size, margins and fit

Screens forgive any size; forms do not.

Fit to image makes each page the size of its photo, which is fine for viewing on screen but produces pages several feet wide, because a 4032 pixel photo becomes a 4032 point page. For anything a person will print or a portal will check, pick A4 or US Letter.

With a paper size, Fit whole image keeps the full photo and leaves white bands where the shapes differ. Fill page crops the edges so the photo covers the page, which removes the strip of table around a photographed receipt. Add a Small margin of 10 mm so printers do not clip the edges.

A worked example: four receipts for an expense claim

From camera roll to portal in a minute.

Input: IMG_2041.HEIC to IMG_2044.HEIC, four receipt photos taken on an iPhone 15. Open this page in Safari, tap the upload area, choose Photo Library and select all four. Wait for the four thumbnails, then press Sort A to Z so they follow the file names. One receipt was shot sideways, so tap its rotate button once.

Settings: Page size A4, Orientation Auto, Margin Small, Image on the page Fill page, Image quality Medium, file name receipts-march. Press Convert to PDF. Output: receipts-march.pdf, four A4 pages at a size most portals accept, saved to the Downloads folder in the Files app.

Mistakes that get photo PDFs rejected

Fix them before you press convert.

Most rejected uploads trace back to one of these.

Leaving Fit to image on for a portal that checks page size. Choose A4 or Letter.
Uploading a huge file. Twelve 4 MB photos at Original quality make a heavy PDF; set Image quality to Medium or Small file.
Converting before every HEIC thumbnail has appeared. Wait for the decoding to finish, then check the page numbers.
Sending pages out of order. Sort by name or drag thumbnails, and check that page 1 is really page 1.
Shooting in poor light. No converter can recover a blurry receipt, so retake it near a window.

Other ways to handle HEIC

Change the camera, or change the file.

To stop future photos saving as HEIC, set Settings, Camera, Formats to Most Compatible, and the iPhone saves JPG instead. It uses more storage but avoids the problem entirely. Photos you have already taken stay HEIC, so the converter is still needed for those. For single photos that need to stay photos, HEIC to JPG converts them without making a PDF, and the bulk image converter handles whole folders at once.

When the PDF is ready, Compress PDF can shrink it further for strict limits, Sign PDF Online adds a signature if the form needs one, and Merge PDF joins it with other documents into one submission.