HEIF Image Extensions: How to Open HEIC Files on Windows

HEIF Image Extensions is the small piece of software most Windows users are missing when an iPhone photo refuses to open. You copy pictures from a phone, double-click one, and Windows either shows a broken thumbnail or asks you to buy a codec — because the file is a .heic, not a .jpg. This guide explains what the format is, exactly which free extensions Windows needs, how to install them in two minutes, and when it's smarter to just convert the files and move on. (Store listings and app details change — the specifics below were checked in July 2026.)

At a glance: ways to open a HEIC file

What is a HEIC file, and why does your phone make them?

HEIC stands for High Efficiency Image Container — it's the file extension for photos saved in HEIF (High Efficiency Image File) format. Apple made it the default camera format on every iPhone since iOS 11 in 2017, and for a good reason: a HEIC photo takes up roughly half the space of an equivalent JPEG at the same visual quality. A typical 12MP shot is around 2–3 MB as HEIC versus 4–7 MB as JPEG, which over thousands of photos is the difference between a full phone and a comfortable one.

The catch is compatibility. JPEG has worked everywhere for thirty years; HEIC still doesn't. Most web browsers (Chrome, Firefox, Edge) can't display HEIC at all, many older apps and upload forms reject it, and Windows can't open it out of the box. That's the gap HEIF Image Extensions exists to fill.

The two extensions Windows actually needs

This is the part that confuses everyone, because there are two separate add-ons and the naming is terrible:

1. HEIF Image Extensions (free, published by Microsoft) — teaches Windows to read the HEIF container format. On many Windows 11 PCs it's already preinstalled; on Windows 10 and clean installs you often have to add it yourself from the Microsoft Store.
2. HEVC Video Extensions — the codec that decodes the actual image data inside a HEIC file (iPhone photos are compressed with HEVC/H.265). Without it, HEIC files can still fail to open even with the first extension installed. Microsoft's own version costs $0.99 in the Store; a "from Device Manufacturer" version has historically been free because hardware makers covered the licensing fee.

So the free "HEIF Image Extensions" alone is often not enough — and the $0.99 HEVC codec is the hidden step most tutorials skip. It's a one-time purchase, and it also unlocks HEVC video playback (the format iPhones use for video) in Windows apps.

Installing them, step by step

1. Open the Microsoft Store app on Windows 10 or 11.
2. Search for "HEIF Image Extensions" and install it (free, published by Microsoft).
3. Search for "HEVC Video Extensions" and install it ($0.99, one time).
4. Restart the Photos app (or File Explorer if thumbnails don't appear).
5. Double-click any .heic file — it should now open in Photos, with thumbnails in Explorer.

If a HEIC file still won't open after both installs, it's usually one of two things: the file is actually corrupted from a bad transfer, or an older third-party viewer has claimed the .heic file association. Right-click the file → Open with → Photos to check.

When converting beats installing codecs

Installing the extensions fixes your PC — but it doesn't help when you need to email the photo to someone, upload it to a form that only accepts JPG, or use it on a website (browsers still don't render HEIC, while the related AVIF format now works in all major browsers). For all of those cases, converting is the practical answer.

The fastest option is a browser-based converter: our free Image Converter turns iPhone photos into universally supported JPG or PNG right on your device, with nothing to install and no files uploaded to a server. If the converted JPGs are headed for a website, run them through the Image Compressor afterwards — our guide on compressing images for the web covers the quality settings worth using.

For bulk conversion of entire folders, a small desktop app is more comfortable: iMazing HEIC Converter (free, drag-and-drop, JPG or PNG output) and CopyTrans HEIC (free for personal use, adds HEIC preview inside Windows Explorer) are the two long-standing choices.

Stop the problem at the source (iPhone setting)

If HEIC files cause you friction every week, change what your iPhone saves in the first place. Go to Settings → Camera → Formats and switch from High Efficiency (HEIC) to Most Compatible (JPEG). New photos will save as JPG that opens everywhere — existing HEIC photos stay as they are.

The trade-off is storage: JPEGs run roughly twice the size, so a 128 GB phone that fits about 50,000 HEIC photos holds closer to 25,000 JPEGs. There's also a lighter-touch option: leave the camera on High Efficiency and enable Settings → Photos → Transfer to Mac or PC → Automatic, which converts photos to JPEG on the fly when you copy them over USB.

What about Mac, Android, and the web?

Everywhere else, the picture is friendlier. Macs have opened HEIC natively since macOS High Sierra, and Safari even renders it on web pages. Android has supported HEIC viewing natively since Android 9 or 10 depending on the device, and Google Photos handles it on effectively any phone. The web is the holdout: Chrome, Firefox, and Edge still treat HEIC as an unknown format, largely because HEVC patent licensing is expensive — which is why royalty-free formats like WebP and AVIF became the web's next-generation choices instead. If you're preparing images for a site, convert HEIC to WebP or JPG; never link a .heic directly.

Frequently Asked Questions

Is HEIF Image Extensions free?

Yes — the HEIF Image Extensions add-on itself is free from the Microsoft Store. The catch is that iPhone HEIC photos also need the HEVC codec to decode, and Microsoft's HEVC Video Extensions costs $0.99 (one time). Together they're still cheaper than any paid converter app.

I installed it and HEIC files still won't open. Why?

Almost always the missing HEVC Video Extensions codec — the free HEIF extension only reads the container, not the image data inside. Install the HEVC codec, restart the Photos app, and check the file association (right-click → Open with → Photos). If one specific file still fails, it likely got corrupted in transfer; re-copy it from the phone.

Does converting HEIC to JPG lose quality?

Slightly, in the sense that JPG is re-compressing the image — but at a high quality setting the difference is invisible in normal use. HEIC stores more data (deeper color, wider dynamic range), so keep the original if you plan to edit seriously, and export JPGs for sharing. If you have an old low-resolution photo you want to sharpen up rather than convert, an AI image upscaler is the tool for that job instead.

Should I just switch my iPhone to JPEG permanently?

If storage isn't tight and you constantly share photos with Windows PCs, forms, or older apps — honestly, yes, the convenience wins. If you take a lot of photos on a smaller-capacity phone, keep HEIC and convert on demand; you effectively double your photo storage for free.

Conclusion

"HEIF Image Extensions" sounds like an obscure codec problem, but the fix is simple: install the free extension plus the $0.99 HEVC codec and Windows treats HEIC photos like any other image — or skip the installs entirely and convert the files to JPG when you need them to work everywhere. For one-off files, do the conversion in your browser with our free Image Converter — it's the two-second version of everything in this guide.