Why will an image not open?

Check whether the app supports the actual file format. A familiar filename extension does not prove that the file contains that format or that it downloaded correctly.

Check in this order

1. Keep the original file unchanged.
2. Check the file size. An empty or unusually small download may be incomplete.
3. Try an application that supports the format.
4. When it opens there, export a copy in a format the receiving app accepts.
5. Check the exported copy before replacing or deleting anything.

Renaming is not conversion

Changing .webp or .heic to .jpg changes the name, not the image encoding. Use a real export operation.

Do not upload a private image to an unfamiliar converter just to test it. The information tool here reads supported files locally, but it cannot repair a damaged file.

Related guides

• HEIC and HEIF: what is the difference?
• File size and image dimensions
• Why does a photo rotate after uploading?

Sources

• MDN: Image file type and format guide
• Apple: Using HEIF or HEVC media on Apple devices