HEIC vs JPG on iPhone: What Happens to Your Photo Metadata When iOS Converts
Since iOS 11, iPhones save photos as HEIC by default. The moment you share one, iOS quietly converts it to JPG and hands over a different file. Most people never notice. But if you care about metadata, that conversion is the difference between a file that still knows where it was taken and one that mostly does not. Here is what each format carries, what survives conversion, and how to check what your own photos are leaking right now.
What HEIC carries that JPG does not
HEIC is the container Apple uses for its version of the HEIF standard, and it holds more than a plain JPG does. The shot you take with the Camera app typically embeds GPS coordinates, capture timestamp, lens and exposure data, the iPhone model, and iOS version. HEIC additionally stores depth mapping data from Portrait mode, Live Photo motion data, and Apple-specific tags including the import session and the name of the album. A JPG conversion keeps the basic EXIF block if the converter chooses to, but depth maps, motion data, and album tags do not translate to the JPG format at all. They are simply dropped.
The conversion that happens when you share
Open Photos, tap share, send the image to Messages or WhatsApp, and iOS converts HEIC to JPG first. The important part is what the conversion does with EXIF. In practice:
- Sending via most social and chat apps: the app itself strips location metadata on upload, so the recipient gets a JPG with no GPS. This is why a photo posted to Instagram does not lead strangers to your house, while the same photo emailed as an attachment often does.
- Sending via AirDrop to a Mac: the transfer is automatic HEIC conversion on some macOS settings and raw HEIC on others. Raw HEIC means the full metadata travels with it, including location.
- Emailing the photo: Mail attaches the file and generally converts to a smaller JPG, but basic EXIF including GPS survives unless you use the image size option, which re-encodes and drops most of it.
- Copy-paste into a document: the pasted image is re-encoded and usually loses nearly all metadata. This is why a photo inside a PDF is often cleaner than the same photo as an attachment.
Notice the pattern: it is not the format that protects you, it is how many re-encoding steps the image passed through. Every conversion is a dice roll on what the receiving app chose to copy. For a deeper look at which chat platforms strip what, see our earlier breakdown of what messaging apps do with photo metadata.
Why the choice of format matters for location
The GPS block in a HEIC sits in the same EXIF structure a JPG uses, so converting alone does not remove location. iOS removes GPS when the destination app asks for a clean file, and keeps it when the destination asks for fidelity, like a file manager or cloud upload. This is why your iCloud photos retain full location data across devices, while the same photo shared to a friend arrives without it. The location is not being deleted for privacy reasons in most cases. It is simply that social platforms refuse it at upload to save themselves storage and liability.
The reverse trap catches people too. Assume nothing about incoming files: a HEIC a client sends you may carry their home address in GPS, and opening it in a desktop viewer on Windows reveals those coordinates to anyone in the room during a screen share. Before forwarding any photo you received, check it. You can drop any HEIC or JPG into the tool and see the full metadata readout before the file moves on.
Which format should you shoot in
Most people should leave the Camera set to High Efficiency (HEIC). It halves file sizes with the same visible quality, and the extra data is useful to you inside your own Photos library. The format only becomes a liability at the moment of sharing, and that is a stripping problem, not a shooting problem. Photographers delivering work to clients are the exception: some legacy print and archive systems still mishandle HEIC, so a deliberate conversion to JPG with metadata removed at export is the safer delivery format.
One caution on third-party converters. Free online converters that promise HEIC to JPG in the browser upload your file to their server, metadata included. You traded a local location leak for a copy of your photo on somebody else's disk. A converter that runs entirely on your device, like the one on this site, never uploads anything.
How to check what your photos actually contain
Settings reveal the defaults, not the reality of a specific file. The only reliable check is reading the file itself. On a Mac, Preview's Tools, Show Inspector does it for one file at a time. For batches, or on any device, the browser tool on this site reads EXIF, XMP, and IPTC from HEIC, JPG, and a dozen other formats without uploading, and tells you exactly what would travel with that file if you sent it now. Thirty seconds with your last ten photos is usually enough to change how you share everything after that.