What is a HEIC file, and why won't it open?

Your iPhone stopped saving JPEGs years ago. Here is what it saves instead, why almost every upload form rejects it, and what a conversion actually costs you.

Updated July 28, 2026

HEIC is a photo squeezed with video compression

A HEIC file is a still image stored in the HEIF container and compressed with HEVC — the same codec used for 4K video. Video codecs are far better at predicting what a picture looks like than the 1992 maths inside JPEG, so the same photo lands at roughly half the size with no visible difference.

Apple switched the iPhone camera to HEIC with iOS 11 in 2017. If your photos end in .HEIC, that is all this is: a normal photo in a newer wrapper.

Why it opens on your phone and nowhere else

Apple ships the decoder, so HEIC opens everywhere on iOS and macOS. Off that island it gets patchy:

Windows 10 and 11 need the HEIF Image Extensions from the Microsoft Store, and that package leans on the HEVC codec, which is a separate paid item on some machines.
Chrome and Firefox do not decode HEIC. Safari does.
Most upload forms — job applications, insurance claims, printing services — check the extension and refuse .heic outright, whether or not they could read it.

Two ways out, and they solve different problems

You can stop your iPhone making them: Settings → Camera → Formats → Most Compatible. From then on the camera saves JPEG. That fixes the future and does nothing for the thousands of photos already on the phone.

Or you convert. That is the only option for what you already have, and it is the right one when you need a single photo out of the phone right now.

What you lose in the conversion

Converting HEIC to JPEG re-encodes the picture, so it is lossy — going back and forth repeatedly will visibly soften it. Convert from the original each time rather than from a previous conversion.

A few things do not survive the trip. A Live Photo becomes a single still, because the motion lives in a separate video track that JPEG has nowhere to put. Depth maps used for Portrait mode and HDR gain maps are dropped for the same reason. Rotation, date and location in EXIF do carry over.

If size is what you are chasing rather than compatibility, note that a JPEG at default quality will usually be larger than the HEIC it came from. That is the trade: HEIC is smaller, JPEG opens everywhere.

Converting without handing the photo to anyone

HEIC files are personal in a way that a spreadsheet is not — they carry faces, and the EXIF carries where you were standing. Uploading them to a free converter to get a JPEG back is a poor trade.

Our image converter decodes HEIC inside the browser tab. The decoder is about 1.5 MB and is fetched only at the moment a HEIC file actually arrives — if you never use HEIC, nothing is downloaded. The photo itself is never sent anywhere.

Do it now, without uploading anything

Is HEIC the same as HEIF?

HEIF is the container format; HEIC is the name for a HEIF file whose images are compressed with HEVC. Apple uses the .heic extension. In practice the two words get used interchangeably.

Will converting lose quality?

Yes, slightly — JPEG and WebP are lossy, so the picture is re-encoded. One conversion from the original is usually invisible. Repeatedly converting an already-converted file is what does the damage.

Can I convert HEIC on a phone?

Yes. The conversion runs in the browser, so a phone works as long as the browser is current. Large batches are slower on a phone simply because there is less CPU to go around.