By default, WordPress does not allow HEIC uploads because most browsers can't display them yet. You must convert them to JPG or WebP before uploading to ensure your visitors can actually see the images.
WordPress says 'Security check failed'? It hates HEIC.
Convert your files to be fully compatible with WordPress.
By default, WordPress does not allow HEIC uploads because most browsers can't display them yet. You must convert them to JPG or WebP before uploading to ensure your visitors can actually see the images.