How to Fix Next.js Image Optimization Error in AI-Built Apps

The Next.js Image component fails to load or optimize images. AI-generated code often misconfigures remote image domains, uses wrong props, or causes layout shift issues.

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Error messages you might see

Error: Invalid src prop on next/image, hostname is not configured under images in next.config
Image with src "/photo.jpg" has either width or height modified, but not the other

Why this happens in AI-generated code

1

Remote hostname not allowed

AI loads images from external URLs without adding the hostname to `images.remotePatterns` in next.config.

2

Missing width and height props

AI omits required `width` and `height` props (or `fill`) causing layout shift or build errors.

3

Using img instead of Image

AI uses plain `<img>` tags, missing out on automatic optimization, lazy loading, and format conversion.

How to fix it

1

Configure remote patterns

Add `images: { remotePatterns: [{ protocol: 'https', hostname: '**.example.com' }] }` to next.config for each external image source.

2

Use fill prop for responsive images

For images that should fill their container, use `<Image fill />` with a relatively-positioned parent instead of fixed dimensions.

3

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Related technologies

Next.jsReactTypeScript

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Frequently asked questions

Should I use next/image for all images?

Yes for content images. For decorative SVGs or tiny icons, plain img tags or inline SVGs are fine.

How do I fix layout shift from images?

Always provide width and height props that match the aspect ratio, or use the `fill` prop with a sized container.

Related resources

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