The iPhone often converts photos to JPEG by itself when you share them from the Photos app by Mail, but not always: photos attached from the Files app or sent from third-party mail apps can go out as the original .heic, which many recipients cannot open. The sure way is to convert the photos to JPG first, for example with the free converter below, which works on the iPhone itself and uploads nothing.
Convert HEIC to JPG →Why emailed iPhone photos sometimes arrive as HEIC
Since iOS 11, iPhones save photos as HEIC, a modern format that takes about half the space of JPEG. Apple devices open it without thinking; much of the rest of the world does not. When you share a photo from the Photos app through Mail or Messages, iOS usually sends a JPEG copy automatically, so nobody notices. The surprise comes when the original slips through instead.
When the iPhone converts for you
Sharing from the Photos app with the share sheet and choosing Mail normally attaches a JPEG copy. The same happens in Messages. There is also a related setting: in Settings, Photos, Transfer to Mac or PC, Automatic makes the iPhone send JPEG copies when you move photos to a computer over USB. None of this touches the HEIC originals in your library.
When it does not convert
The automatic conversion has gaps. Photos attached from the Files app go out as the original file. Some third-party mail apps, like Gmail or Outlook, attach the .heic original instead of a converted copy. And if you saved a photo to Files from Downloads or received it in a ZIP, there is no conversion step at all. If the recipient answers with “I can’t open this”, this is usually why.
The sure way: convert to JPG before you send
- Open the HEIC to JPG converter below on the iPhone, or on any computer.
- Choose the photos you want to email. Everything happens in the browser: the photos are not uploaded anywhere.
- Convert and download the JPG copies. On the iPhone they land in Downloads, inside the Files app.
- Attach the JPG files to your email. Every recipient can open them, on any device.
For photos you have not taken yet
If you often email photos to people outside the Apple world, you can make the camera shoot JPEG from now on: Settings, Camera, Formats, Most Compatible. New photos are saved as JPEG and share without any conversion. Files get bigger and the photos you already took stay in HEIC, so the converter remains useful.
A privacy note for emailed photos
Email attachments are easy to forward, so it is worth knowing what travels inside them. The JPG copies from TotImages carry no metadata: no location, no camera model, no date. The conversion happens on your own device, so the photos are not uploaded to a converter server either. If a photo should not leave your hands at all, no online service will give you that: this one keeps the file with you.
Keep your originals. Conversion creates a new copy; metadata, HDR and extra frames are not retained.
Questions, answered
Does the iPhone Mail app convert HEIC to JPG automatically?
Usually, yes: sharing from the Photos app through Mail attaches a JPEG copy. But it is not guaranteed in every path. Photos attached from the Files app or sent from some third-party mail apps can go out as the original .heic. Converting first removes the doubt.
Can I convert the photos on the iPhone itself?
Yes. TotImages runs entirely in the browser, so it works on the iPhone or iPad without installing anything. The converted JPG files go to Downloads in the Files app, and you can attach them from there.
Do the JPG copies keep the location of my photos?
No. TotImages does not retain metadata, so the JPG copies carry no location, camera or date information. For photos you email to strangers or post in forms, that is exactly what you want.
Will the recipient notice any quality loss?
JPG uses lossy compression, but at high quality the difference is invisible for normal photos. Keep the HEIC originals as your master copies and use the JPG versions for sending.
Sources
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