HEIF to JPG — The iPhone Photo Format Nobody Asked For

Somewhere around 2017, Apple decided that JPEG — the image format that worked perfectly fine for 25 years — wasn't good enough for iPhones. So they switched the default camera format to HEIF (High Efficiency Image Format), also known by its file extension HEIC.

And that's when the emails started: "I can't open the photo you sent me."

What HEIF Actually Is

HEIF is an image container format based on the HEVC (H.265) video codec. In plain English: it uses video compression technology to make photo files smaller while maintaining quality. And it genuinely works — HEIF files are roughly half the size of equivalent JPEGs at the same visual quality.

The technical merits are real:

• 50% smaller files than JPEG at comparable quality


• Supports 16-bit color depth (JPEG maxes at 8-bit)


• Can store image sequences, depth maps, and HDR data


• Supports alpha transparency

So why is everyone still converting back to JPEG?

The Compatibility Disaster

Because almost nothing outside of Apple's ecosystem handles HEIF well:

• Windows didn't support HEIF natively until Windows 10 (and even then, you need to install a codec from the Microsoft Store, which sometimes costs money)
• Android support varies by manufacturer and OS version
• Web browsers — Chrome and Firefox only added HEIF support recently, and it's still spotty
• Social media platforms — most accept HEIF now, but some older integrations still choke
• Photo printing services — many still require JPG or PNG uploads
• Email — attach a .heic file and half your recipients can't open it
• Older software — Photoshop CS6, GIMP before version 2.10, countless other tools simply refuse the format

Apple does automatically convert to JPEG when you share photos via certain methods (AirDrop to non-Apple devices, email from the Photos app). But this doesn't always kick in, especially when files are transferred via USB, cloud storage, or file managers.

The "Most Compatible" Setting

You can force your iPhone to shoot in JPEG instead of HEIF:

Settings > Camera > Formats > Most Compatible

This switches back to JPEG/H.264. The downside? Your photos take up roughly twice the storage space. If you have a 128GB iPhone that's already full, that's a real tradeoff.

Personally, I leave it on HEIF and convert when I need to. Storage is more valuable than the occasional format conversion.

Batch Converting Your Photo Library

If you've pulled photos off an iPhone and now have hundreds of .heic files that won't open on your Windows PC, batch conversion is what you need.

MyPDF's HEIF to JPG converter handles bulk conversions — upload multiple files, get JPEGs back. The conversion preserves EXIF metadata (date taken, GPS coordinates, camera settings), so your photo organization tools still work correctly.

Quality Considerations

When converting HEIF to JPEG, you're going from a more efficient codec to a less efficient one. To maintain visual quality, use a JPEG quality setting of 90-95. Going lower than 85 introduces visible compression artifacts, especially around text and sharp edges.

The file size will increase — that's unavoidable. A 2MB HEIF file might become a 4-5MB JPEG. That's the price of universal compatibility.

Live Photos and HEIF Sequences

iPhones can store Live Photos as HEIF sequences — multiple frames in a single .heic file. When converting to JPG, you'll get the key frame (the main photo). If you want the video component, you need to extract that separately as a MOV or MP4.

The Long Game

HEIF support is improving every year. Eventually, it might reach JPEG-level universality. But "eventually" isn't today, and until every platform, device, and piece of software handles it seamlessly, HEIF-to-JPG conversion remains a necessary fact of life for iPhone users.

Related Tools

• HEIF to JPG — Convert iPhone photos to universal JPEG
• HEIF to PNG — Lossless conversion alternative
• Image Compressor — Reduce JPEG file sizes after conversion
• Image Resize — Resize photos for specific platforms