v0
storage
Image Optimization Not Working with next/image
Images in your v0-generated Next.js application are either not being optimized by the next/image component, displaying broken placeholders, or failing to load entirely. The Image component shows errors about unconfigured domains, and images served from external sources are returned unoptimized at their original size.
This is particularly problematic for performance because unoptimized images are often the largest assets on a page, and v0 frequently references external image sources like Unsplash, Cloudinary, or user-uploaded content from various CDNs.
The next/image component requires explicit domain whitelisting in next.config.js, and v0 may not have added all the necessary domains to the configuration.
Error Messages You Might See
Error: Invalid src prop on next/image, hostname not configured
Image with src has either width or height modified
Error: Image Optimization using default loader is not compatible
Warning: Image with src was detected as the Largest Contentful Paint
Common Causes
- External domains not whitelisted — next.config.js remotePatterns or domains array missing the image source domain
- Using img tag instead of Image component — v0 generated standard HTML img tags that bypass optimization
- Missing width and height props — Image component requires explicit dimensions or fill mode
- Vercel image optimization quota exceeded — free tier limited to 1000 optimized images per month
- Incorrect loader configuration — custom loader not returning proper URL format for the image CDN
How to Fix It
- Add remote patterns — configure next.config.js with
images: { remotePatterns: [{ protocol: 'https', hostname: '**.example.com' }] } - Replace img with Image — import Image from 'next/image' and replace all <img> tags with <Image> components
- Use fill mode for dynamic sizes — for images with unknown dimensions, use
<Image fill sizes="100vw" />inside a relative-positioned container - Add blur placeholders — use
placeholder="blur" blurDataURL="data:image/..."for better loading experience - Configure custom loader — for Cloudinary or similar CDNs, create a custom loader function that generates optimized URLs
Real developers can help you.
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization.
I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems.
My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.**
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zipking
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Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
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Jared Hasson
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Prakash Prajapati
I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
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Get HelpFrequently Asked Questions
How do I whitelist all subdomains for an image host?
Use remotePatterns with a wildcard: { hostname: '**.cloudinary.com' }. This matches any subdomain of cloudinary.com.
Should I use width/height or fill?
Use width/height when you know the image dimensions. Use fill when the image should fill its parent container responsively. Always provide sizes prop with fill.
How do I check if images are being optimized?
Open DevTools Network tab, filter by images, and check the URL. Optimized images are served from /_next/image with width and quality parameters.