Choose the right approach
| Need | Route | Trade-off |
|---|---|---|
| Inspect a few photos | Browser HEIC viewer | Generates JPEG previews; original remains unchanged |
| Keep using Photos | Follow the app's extension prompt | Depends on Windows, app and codec support |
| Share a photo widely | HEIC to JPG | Re-encodes the image; keep the original |
| Submit a document | HEIC to PDF | Image-based PDF without OCR |
Preview locally in the browser
Select up to 20 HEIC/HEIF files, each at most 10MB. Wait for decoding, switch thumbnails, zoom in to inspect the image, and download a JPG preview if useful. Files are not sent to a conversion server. Start with a single file if the tab struggles with a large batch.
This viewer decodes to JPEG and displays the first decoded image of multi-image output. It does not expose EXIF/GPS, play Live Photos, or guarantee original HDR, wide-gamut or 16-bit rendering. A usable preview confirms a decoding path worked; it does not prove every part of the original container was preserved.
Use Windows Photos when native support matters
Microsoft's Photos extension guidance documents missing HEIF/HEVC support in Windows 10 Photos. Follow your installed Photos app's prompt to official Microsoft Store extensions, then reopen the app. Requirements and availability can differ across Windows versions; this is not a promise that every Windows 11 installation needs the same extensions or that a codec is free. Avoid unknown codec download sites.
Diagnose a file that still will not open
- Check the file's size. A cloud placeholder or interrupted transfer may not contain the full photo; download the original again.
- Open it on the device that created it. If that also fails, conversion may not recover it.
- Try one known-good HEIC in the viewer. If one works and another fails, suspect a file-specific variant or damage rather than the extension alone.
- Export JPG or PNG from an app that opens the original, and keep both files. Renaming .heic to .jpg does not change the encoded contents.
Apple's HEIF guidance explains that some sharing or transfer paths may convert a photo automatically. Check the actual file you received instead of assuming it is still HEIC.
Before sharing or printing
Open the converted file in the recipient's target app where possible. Check orientation, small details and colors, and confirm that the recipient wants JPG rather than a PDF. Do not treat conversion as a verified metadata-removal service. For batch limits, download issues and reproducible error reports, see help and contact.
Use a comparison file to narrow down the problem
Try one photo known to open on its source device, then the troublesome file in the same browser. Keep the browser and settings unchanged so that you are comparing the files rather than several variables at once.
| What you observe | Useful next check |
|---|---|
| The comparison photo previews, the other does not | Re-download the other original; a file-specific variant or incomplete transfer is possible |
| Both fail in the browser but open in a native app | Try a current browser or export JPG from that app; browser decoding has different limits |
| The same photo fails in both places | Check the source device or a backup before assuming a codec purchase will help |
| Preview works, recipient cannot open the download | Check the actual output format and open the saved file in the recipient’s app |
This is a diagnostic comparison, not proof that a file is damaged. A preview also does not certify the original container, metadata or color information. If the goal is printing several photos as one document, use HEIC to PDF; converting to JPG first adds another encoding step without being required by this site's PDF tool.