How do I shrink iPhone photos before uploading them to my shop?

The HEIC issue in brief

iPhones save photos as HEIC by default because it saves space. The Image compressor does not accept that format: it reads the start of each file to learn its real type instead of trusting the extension, and it accepts only JPEG, PNG and WebP. Drop in a HEIC file and you get a message saying the file is not supported, with the list of accepted types. Even renaming the file to .jpg will not fool it, because the tool can tell it is not really a JPEG.

Case one: compressing on the iPhone itself

1. Open the compressor page in Safari or any browser on the iPhone.
2. Tap the button to choose files, pick Photo Library, and select the product photos.
3. When a page asks for specific formats such as JPEG, iOS usually converts HEIC photos to a JPEG copy on the fly, so the tool accepts them.
4. Choose JPEG at quality 80, and check the table and the preview.
5. Download the photos. On an iPhone they usually land in the Files app, from where you can upload them to your store.

iPhone screenshots are saved as PNG, which the tool accepts and turns into JPEG or WebP. Professional capture formats such as ProRAW are not accepted.

Case two: you moved the photos to a computer

• If the photos reached your computer as .heic files, convert them to JPEG first with your computer's photo app, then add them to the tool.
• The lasting fix: in the iPhone's settings, open Camera, then Formats, and choose Most Compatible, so new photos are saved as JPEG from the start. This takes more storage on the phone.
• Large batches run faster on a computer, since all the processing happens on your own device.

Are iPhone photos too big for the tool?

Usually not. A 12 megapixel main camera photo is 4032×3024, which is 12,192,768 pixels, and the tool's limits are 50 megapixels and 40 MB per image. Some models shoot at higher resolutions in certain modes; if you see a message that the dimensions exceed the limit, reduce them first with the Image resizer. And because iPhone photos are far wider than most product pages display, reducing the dimensions before compressing usually saves more than lowering the quality. We have not quoted file sizes here because an iPhone photo's size varies a lot with the scene and lighting; the tool shows you the real figures for your own photos.