PixFlipHEIC Files Not Opening on Windows 11? 8 Fixes That Actually Work
Short answer:90% of “HEIC won't open on Windows” problems come down to a missing HEVC codec, not the HEIF extension itself. The fixes below are ordered from most likely to fix it (Fix 1 & 2) to last-resort. If you just want to view the photos once, skip to Fix 8.
If you have already read our setup guide How to Open HEIC Files on Windows 11 & 10 and HEIC still refuses to open, work through these in order.
Fix 1: You probably only installed half the codec
Microsoft splits HEIC support into two store packages:
- HEIF Image Extensions — free. Tells Windows that .heic files are images. Does not decode them.
- HEVC Video Extensions — required to actually decode the HEVC-compressed pixel data inside the HEIC file.
The HEVC package comes in two flavors:
- “HEVC Video Extensions from Device Manufacturer” — free, but only visible if your hardware vendor enables it. Search the Microsoft Store directly: open the Store, paste
ms-windows-store://pdp/?productid=9N4WGH0Z6VHQin Run (Win+R). If your PC is eligible, the free version appears. - HEVC Video Extensions — $0.99. Works on any Windows 10/11. This is the reliable path if the free version is not available to you.
Fix 2: No thumbnails in File Explorer
Codecs install but Explorer keeps showing generic icons. Three-step rescue:
- Restart Explorer. Ctrl+Shift+Esc → find Windows Explorer in the Processes tab → right-click → Restart.
- Clear the thumbnail cache. Win+R →
cleanmgr→ select your C: drive → tick Thumbnails → OK. Reboot. - Force regeneration. Open the folder in Details view first (View menu → Details), wait a few seconds, then switch back to Large Icons. Thumbnails populate on demand.
Fix 3: “Codec is missing” (0xc00d36b4) in Photos app
The Photos app throws this when it can identify the file as HEIC but has no decoder. Solution: install HEVC Video Extensions (Fix 1, paid or free). After install, restart the Photos app and try again — no reboot needed.
If you have already installed the extension and the error persists, open Settings → Apps → Installed apps → find HEVC Video Extensions → Advanced options → Reset. This clears any half-installed state.
Fix 4: Some HEIC files open, others fail
Telltale sign of HDR / 10-bit HEIC. iPhones from the iPhone 12 onward shoot HDR HEIC by default in good lighting, and the basic codec can stumble on 10-bit data. Two options:
- Use the paid HEVC extension — it handles 10-bit properly.
- Convert the problem files to JPG. The PixFlip HEIC to JPG converter tone-maps HDR HEIC down to 8-bit JPG cleanly — no codec needed.
Fix 5: Photos app crashes on HEIC
Settings → Apps → Installed apps → Microsoft Photos → Advanced options → Repair. If repair does not help, hit Reseton the same screen — that wipes the app's state without uninstalling it. As a last resort, switch to another viewer: right-click the HEIC file → Open with → choose an alternative.
Fix 6: You are on an old Windows 10 build
HEIC support became reliable only on Windows 10 version 1809 and later. Check yours: Win+R → winver. If you see anything below 1809, update Windows first. On a very old machine that cannot update, your only realistic option is converting the HEIC to JPG online and never dealing with the codec at all.
Fix 7: The file may not actually be HEIC
Some apps export HEIF with a .heic extension, or vice versa. Windows is picky about this. If a specific file refuses to open while siblings work, rename the extension to .heif and retry — and the other way around. Make a copy before renaming, just in case.
Fix 8: Skip the codec mess entirely — convert to JPG
If you only need to see the photos once or share them with colleagues, installing two Microsoft Store packages and fighting with the thumbnail cache is more work than it's worth. PixFlip's HEIC to JPG converter decodes HEIC in your browser (WebAssembly, libheif) and gives you JPGs that open in every Windows version going back to Windows XP. No upload, no install. For different output formats see HEIC to PNG or HEIC to WebP, or the full hub at /heic-converter.
Quick Decision Table
| Symptom | Start here |
|---|---|
| Cannot open any HEIC, even after HEIF Extensions | Fix 1 (install HEVC) |
| No thumbnails in File Explorer | Fix 2 (cache + restart) |
| 0xc00d36b4 / “codec missing” | Fix 3 (reset HEVC ext) |
| Some HEIC fail, others open | Fix 4 (HDR / 10-bit) |
| Photos app crashes | Fix 5 (Repair / Reset) |
| Just want to view them now | Fix 8 (convert) |
Tired of fighting Windows codecs?
Convert HEIC to JPG — free, no install →Frequently Asked Questions
I installed HEIF Image Extensions but HEIC still won't open. Why?
HEIF Extensions is only half the story. To decode the actual image data, Windows also needs the HEVC codec. On Windows 11 it is usually bundled by your OEM (preinstalled). If not, you need 'HEVC Video Extensions from Device Manufacturer' (free, sometimes hidden) or the paid 'HEVC Video Extensions' ($0.99) in Microsoft Store. Without HEVC, HEIF Extensions can register the file type but cannot actually render it.
HEIC files show no thumbnail in File Explorer — how do I fix it?
Three things to try, in order: (1) restart File Explorer from Task Manager — right-click explorer.exe → Restart. (2) Clear the thumbnail cache: Disk Cleanup → tick 'Thumbnails' → OK. (3) Reopen the folder in Details view first, then switch back to Large Icons — sometimes Explorer just needs a nudge to regenerate thumbnails after a codec install.
I get error 0xc00d36b4 or 'codec is missing' opening HEIC in Photos. What now?
That error means the Photos app cannot find an HEVC decoder. Open Microsoft Store, search 'HEVC Video Extensions', and install. If the free 'from Device Manufacturer' version is not listed in your store, your machine cannot use it — buy the paid $0.99 version, or skip the codec entirely and convert HEIC to JPG once at PixFlip.
Some HEIC files open, others fail. What's different about them?
Most likely the failing ones are HDR / 10-bit HEIC (common from iPhone 12 and later in HDR mode). The basic HEVC decoder handles 8-bit just fine, but 10-bit HEIC requires a fuller codec — usually the paid HEVC extension, or a third-party viewer. Converting to JPG sidesteps the issue entirely because the conversion handles the decoding once.
Is there a way to view HEIC on Windows without installing anything?
Yes — convert them to JPG in your browser. PixFlip's HEIC to JPG converter runs entirely in your browser via WebAssembly, so there is nothing to install and nothing is uploaded. Drag a folder of HEIC in, get a ZIP of JPGs out. It is the fastest fix when you just need to see the photos once.