Batch Resize Images
Resize multiple images to specific dimensions for consistent display across your website or application.
Create Responsive Image Variants
Generate multiple size variants of images for responsive web design and optimal display across devices.
Quick answer: Use the Image Ops tool through ToolRouter to create responsive image variants directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolModern responsive web design requires serving different image sizes to different devices. A 3000px hero image that looks sharp on a 4K monitor is wasteful on a mobile phone with a 375px viewport. Serving oversized images to mobile devices wastes bandwidth, increases load time, and hurts Core Web Vitals scores.
The solution is generating multiple variants of each image at different resolutions and using srcset or picture elements to let the browser pick the right one. But manually creating 3-5 variants of every image is impractical. ToolRouter's transform_image skill automates this by generating all the variants you need from a single high-resolution source.
A typical responsive image strategy might generate variants at 400px, 800px, 1200px, and 2400px widths from a single source image. Combined with format conversion (WebP for modern browsers, JPEG fallback), this ensures every visitor gets the optimal image for their device and connection speed. The result is faster page loads, lower bandwidth costs, and better Lighthouse performance scores.
How to create responsive image variants with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Claude turns responsive image generation into an interactive terminal workflow. Describe your breakpoints and design requirements, and Claude generates all variants while explaining the size decisions. Ask follow-up questions like "should we add a 2x retina version?" and Claude produces the additional variants along with ready-to-use HTML srcset markup.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
How to create responsive image variants with Claude
Once connected (see setup above), use the Image Ops tool:
- Ask Claude: "Create responsive variants of this image at 400, 800, 1200, and 2400px widths"
- Claude generates all four variants using transform_image
- Ask Claude to also create WebP versions of each variant
- Request the srcset HTML markup for using the variants on your website
Example prompt for Claude
Try this with Claude using the Image Ops tool
Generate responsive variants of our hero image: 400px, 800px, 1200px, and 2400px. Create both WebP and JPEG versions.
Tips for Claude
- Ask Claude to generate the picture element HTML alongside the image variants
- Request Retina (2x) variants for high-DPI displays
- Claude can determine optimal breakpoints based on your design system
ChatGPT generates responsive image variants with strategic context, recommending optimal breakpoints based on your layout and explaining the bandwidth savings each variant provides. It produces a responsive image strategy document alongside the variants, including srcset markup and performance impact estimates your development team can implement directly.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
How to create responsive image variants with ChatGPT
Once connected (see setup above), use the Image Ops tool:
- Ask: "Create responsive image variants for this photo at standard breakpoints"
- ChatGPT generates variants at recommended sizes
- Request: "What srcset values should I use for these variants?"
- Ask for the complete HTML implementation for responsive images
Example prompt for ChatGPT
Try this with ChatGPT using the Image Ops tool
Create responsive variants of our product images. Give me the right sizes for mobile, tablet, and desktop.
Tips for ChatGPT
- ChatGPT can recommend the optimal breakpoints for your layout
- Ask for bandwidth savings estimates from serving responsive images
- Request a responsive image strategy document for your development team
Copilot generates responsive variants from within your IDE and immediately helps write the implementation code. Create image variants and get the corresponding React components, Next.js Image configurations, or picture element markup in the same workflow. Copilot understands your framework and generates framework-specific responsive code.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
How to create responsive image variants with Copilot
Once connected (see setup above), use the Image Ops tool:
- In Copilot Chat: "Generate responsive variants of this image at standard breakpoints"
- Review the generated variants
- Ask Copilot to create a React component that uses srcset with these variants
- Add responsive image generation to your build pipeline
Example prompt for Copilot
Try this with Copilot using the Image Ops tool
Generate responsive variants for all hero images and create a Next.js Image component config for them.
Tips for Copilot
- Copilot can generate Next.js Image, picture element, or srcset implementations
- Automate variant generation in your build process for new images
- Great for creating responsive image components in your design system
OpenClaw automates responsive variant generation at scale, processing entire image libraries into multiple size breakpoints in a single batch. Output includes organized directories by breakpoint, format, and resolution with metadata manifests. Feed the structured output directly into your static site generator or CDN configuration.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsHow to create responsive image variants with OpenClaw
Once connected (see setup above), use the Image Ops tool:
- Ask OpenClaw: "Create responsive variants of this image at 400, 800, and 1600px"
- OpenClaw generates the variants at each size
- Review the outputs and request additional sizes if needed
- Implement the variants in your responsive design
Example prompt for OpenClaw
Try this with OpenClaw using the Image Ops tool
Generate responsive image variants for our blog images at mobile, tablet, and desktop breakpoints.
Tips for OpenClaw
- Define your standard breakpoints once and apply them to all images
- Combine with format conversion for maximum performance improvement
- Test the variants on real devices to verify visual quality at each size
Frequently Asked Questions
How do I create responsive image variants with an AI assistant?
Generate multiple size variants of images for responsive web design and optimal display across devices. Connect the Image Ops tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask Claude: "Create responsive variants of this image at 400, 800, 1200, and 2400px widths" Claude generates all four variants using transform_image
Which AI assistants can create responsive image variants?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all create responsive image variants using the Image Ops tool through ToolRouter, with no API keys or coding required.
What does the Image Ops tool do?
Transform, resize, convert, and optimize images programmatically for web, mobile, and print workflows.
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