How to Convert HEIC to JPEG on iPhone in 2026 (Batch, Offline, No Quality Loss)

If you've ever tried to upload an iPhone photo to a website, attach it in an old email client, or send it to someone on Windows or Android, you've probably hit the HEIC wall: "file format not supported." Your iPhone has been quietly saving every photo since iOS 11 as HEIC, and a chunk of the rest of the internet still doesn't accept it.

The fix is to convert HEIC to JPEG. This guide shows the fastest way to do it on iPhone — in batch, without a Mac, without uploading anything to a website, and without losing visible quality.

What is HEIC and why does iPhone use it?

HEIC stands for High Efficiency Image Container. It's Apple's implementation of the HEIF standard, introduced with iOS 11 in 2017. The headline advantage: HEIC files are roughly half the size of a JPEG at similar visual quality, which is why Apple made it the default photo format. On a 256 GB iPhone with a 30,000-photo library, that's the difference between using 80 GB and 160 GB.

The trade-off: HEIC isn't universally supported. As of 2026 you'll still hit compatibility issues with:

• Older versions of Windows (anything before Windows 11 requires the HEIF extension)
• Older Android devices and apps
• Many web upload forms (auctions, dating apps, government sites, some social networks)
• Some photo-card and print sites, especially if the photos went through a Windows PC first (ordering cards right now? see finding and sending your holiday card photo)
• Older versions of Microsoft Office and Adobe products
• Email clients that don't preview HEIC inline

Which is why "convert HEIC to JPG" is one of the most searched iPhone questions of the year.

The fastest way: batch convert on iPhone

The web-converter route asks you to upload photos to a stranger's server, click through ads, and download them one at a time. For one photo it's tolerable; for the hundred receipt photos you took last quarter it's untenable. And it's a privacy gap — those photos often contain location metadata and recognizable faces.

Phone Diet runs on iPhone and iPad (iOS 17.0 or later, or iPadOS 17.0 or later). Similar Photos groups near-identical shots and marks the best one 'Keep'. Duplicates are exact copies. It also finds blurry and dark photos, screenshots, screen recordings, Live Photos, and bursts, and it lists Largest Files. Photos never leave the device. Video compression uses HEVC and can make a video up to 70% smaller. Undo has a countdown, and Recover keeps removed items for 30 days, or 7 or 60. Smart Albums, swipe to sort, and On This Day are included. The full scan is free, and the first cleanup of up to 1 GB is free.

Step-by-step

1. Download Phone Diet free from the App Store.
2. Phone Diet includes an HEIC converter. Photos never leave the iPhone. The listing does not describe a PNG option, a quality percentage, or a keep-originals switch.

JPEG vs PNG: which should you pick?

Default to JPEG. Pick PNG only when you need a perfect lossless copy for further editing, or when the photo contains text or graphic content that JPEG can soften.

How to stop your iPhone from saving HEIC in the future

If you're constantly converting because you regularly need JPEG, switch the camera's default format. New photos will save as JPEG; existing HEIC photos are unaffected.

1. Open the iPhone Settings app.
2. Scroll down to Camera.
3. Tap Formats.
4. Pick Most Compatible.

The trade-off is that your photo library will grow about twice as fast going forward. If you're already running tight on iPhone storage, leave the default on High Efficiency and convert in batches when you need to share. The other camera settings that fill your storage — 4K 60, ProRAW, Live Photos — are worth checking while you are in there.

Other ways to convert HEIC on iPhone (and their trade-offs)

The built-in Files trick

Apple's Files app supports a "Save to Files" + AirDrop combination that quietly converts HEIC to JPEG. It works one photo at a time and is fiddly: select photo in Photos → Share → Save to Files → pick a destination → AirDrop the file back. Useful for a single photo, painful for a hundred.

Mail attachment hack

Attaching a HEIC photo to an email in the Mail app sometimes converts it to JPEG automatically. The conversion is inconsistent across mail providers and stripped of EXIF metadata. Don't rely on it for anything that matters.

Shortcuts

You can build a custom Shortcuts workflow with the "Convert Image" action. This works but requires manual setup, and Shortcuts is rate-limited on large batches. Fine for the occasional batch of 10–20; impractical for hundreds.

Online converters

Many websites offer free HEIC to JPG conversion. The problem is privacy: every photo you upload sits on a stranger's server, often with EXIF location data intact. For receipts and screenshots that's manageable; for personal photos it's not.

Privacy: why on-device matters

Web HEIC converters work because they accept your upload, run a conversion on their server, and let you download the result. That convenience comes with a real trade. Every photo you upload:

• Sits on a third-party server long enough to convert (and sometimes longer — terms of service vary)
• Carries EXIF metadata: GPS coordinates, device, date, and sometimes faces
• Crosses the open internet — most converters use HTTPS but you're trusting their infrastructure
• Is often funded by ads or by selling aggregated upload patterns

An on-device converter avoids all of that. Phone Diet doesn't operate a server that touches photos — the entire conversion runs in the iOS sandbox on your iPhone. The app works the same in airplane mode as it does on Wi-Fi.

Frequently asked questions

Does converting HEIC to JPEG reduce quality?

The listing describes an HEIC converter. It does not describe a quality percentage. JPEG is a more widely supported format than HEIC, and a JPEG copy is often a larger file.

Does the converter preserve EXIF metadata?

The listing describes an HEIC converter. It does not describe PNG output or which metadata fields are copied.

Can I convert Live Photos?

Yes — the still image portion of a Live Photo is converted. The video component is stripped (JPEG is a still-image format). If you want to keep the Live Photo aspect, leave the original HEIC in place.

Will my iCloud library be affected?

iCloud sync the new JPEG copies the same way it syncs any photo you save. If you delete the originals, they move to Recently Deleted in iCloud Photos with the standard 30-day retention.

Is the HEIC Converter free?

Phone Diet is free with in-app purchases. The full scan is free, and the first cleanup of up to 1 GB is free. HEIC conversion is part of those in-app purchases: Weekly $4.99, Monthly $12.99, Annual Premium $34.99, or Lifetime $59.99.

The bottom line

HEIC isn't going away — Apple's storage efficiency argument is sound. But the rest of the web hasn't caught up, and probably won't anytime soon. The pragmatic answer is to keep your camera on High Efficiency for the storage win and batch-convert to JPEG when you need to share.

Do it on the iPhone. Don't upload your photos to a converter site you've never heard of. Phone Diet includes an HEIC converter. Photos never leave the iPhone.