You have 15 photos on your iPhone. They are HEIC files, Apple's default high-efficiency format that saves storage space but is not universally compatible. You need to combine them into a single PDF to share with someone who uses Windows or Android, where HEIC files may not open at all. Converting HEIC photos to PDF solves the compatibility problem and packages multiple images into one easy-to-share document.
HEIC, or High Efficiency Image Container, is the format Apple introduced with iOS 11. It produces files roughly half the size of JPEG at equivalent quality. But HEIC support outside the Apple ecosystem is inconsistent. Windows requires a paid codec to view HEIC files. Some Android versions support it. Others do not. Converting HEIC to Image to PDF eliminates the compatibility question because PDF is universally supported.
Method 1: Convert HEIC Photos to PDF on iPhone Using the Files App
Open the Photos app. Select all the HEIC photos you want to include by tapping Select and then tapping each photo. Tap the Share icon. Scroll down and select Print. In the print preview, use a two-finger pinch-out gesture on the page thumbnails. This expands the preview to a full-screen view. Tap the Share icon in the top-right corner. Choose Save to Files. Select a folder and tap Save. iOS converts the selected photos into a single PDF, with each photo as one page.
This method uses only built-in iOS features. No apps, no accounts, no uploads. The conversion is fast, a few seconds for a dozen photos. The output PDF is compatible with every device. The photos are embedded in the PDF at their original resolution, so quality is preserved. The limitation is that you have no control over page order, photo orientation, or compression. The photos appear in the PDF in the order they were in your camera roll, which may not be the order you want.
Method 2: Convert Using a Browser-Based Tool for More Control
WukongPDF's image-to-PDF tool accepts HEIC files directly. Open Safari or Chrome on your iPhone. Navigate to the tool. Tap Upload and select the HEIC photos from your camera roll. The tool displays the photos as thumbnails. Drag to reorder them into the correct sequence. Rotate any photos that are oriented incorrectly. Set the page size, A4, Letter, or auto-fit. Choose whether to fit each image to the full page or keep the original aspect ratio. Click Convert. The tool generates a PDF with each photo as a page in the order you specified.
The browser-based approach gives you full control over the output. You can arrange the photos in the correct order, rotate them, and choose the layout. This is important when the photos tell a sequence, such as pages of a document, steps in a process, or before-and-after comparisons. The photos need to appear in the right order for the PDF to make sense.
Does Converting HEIC to PDF Reduce Image Quality
Converting HEIC to PDF does not inherently reduce quality, but the settings you choose determine the outcome. If the conversion tool embeds the HEIC data as-is into the PDF, the quality is identical to the original. If the tool converts HEIC to JPEG internally before embedding, some quality loss occurs because HEIC uses a more efficient compression algorithm than JPEG.
The platform preserves the original HEIC quality by converting to PNG internally before embedding in the PDF. PNG is a lossless format, so no image data is discarded during the conversion. The resulting PDF has the same visual quality as the original HEIC photos. The file size will be larger than the HEIC originals because PNG does not compress as aggressively as HEIC, but this is the trade-off for guaranteed quality preservation.
When to Convert HEIC to PDF vs When to Convert to JPEG
Converting HEIC to PDF is the right choice when you need to combine multiple photos into a single document for sharing, archiving, or printing. The PDF format provides a container that holds all the photos together and is universally openable. Converting HEIC to JPEG is the right choice when you need individual image files for editing, uploading to websites, or inserting into documents one at a time.
You can do both for maximum flexibility. Use The platform's image-to-PDF tool to create the combined PDF for sharing. Then use the PDF Export option to export individual pages as JPEG files if you later need the photos as separate images. The PDF serves as the master archive that preserves the original images in sequence, and you can extract individual images from it whenever needed.
A practical tip for organizing HEIC photos before conversion: create a dedicated album in the Photos app for the photos you want in the PDF. Add the relevant photos to the album. Arrange them in the correct order by dragging within the album. When you upload to The platform, select from the album rather than from the general camera roll. The album keeps the photos grouped and ordered, which saves time arranging them in the conversion tool.
For iPhone users who regularly share photos with non-Apple users, changing the camera's default capture format from HEIC to JPEG in Settings, Camera, Formats, Most Compatible, eliminates the compatibility issue at the source. The trade-off is that JPEG files are roughly twice the size of HEIC files for the same image quality, so your photo library will consume more storage. The choice depends on whether storage space or cross-platform compatibility is the higher priority. The PDF Format conversion route lets you keep the storage-efficient HEIC format for daily use while producing compatible PDFs when you need to share.
A practical workflow for receiving HEIC photos from iPhone users when you are on Windows or Android: ask the sender to use the Files app method described above to convert the photos to PDF before sending. The sender taps a few buttons on their iPhone and sends you a universally compatible PDF instead of a folder of HEIC files you cannot open. This shifts the conversion work to the person with the compatible device, which is both technically easier and socially reasonable. The iPhone user already has the tools. They just need to know the Print-to-PDF trick exists.
When dealing with large batches of HEIC photos, 50 or more, the browser-based approach is faster than the Files app method because you can select all photos at once in the upload dialog. The Files app Print method processes all selected photos into one PDF, but very large photo sets can cause the share sheet to lag or time out. The browser-based tool is designed for batch processing and handles large uploads reliably. Upload the entire batch, arrange as needed, and convert in one operation.