How to Generate Thumbnails with Claude
Generate image thumbnails with Claude and ToolRouter. Consistent preview images for any content.
Tool
Claude makes thumbnail generation a conversational terminal workflow. Describe your thumbnail needs and content type, and Claude asks about cropping preferences, aspect ratios, and whether certain image regions should be prioritized. Review results on a test batch and provide feedback like "crop tighter on the product" before processing your full library.
Connect ToolRouter to Claude
1Go to Settings → Connectors → Add custom connector
2Enter the details below and click Add
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Done — works on Claude chat, desktop, and mobile
Steps
Once connected (see setup above), use the Image Ops tool:
- Ask Claude: "Generate a 300x200 thumbnail from this image using image-ops"
- Claude creates the thumbnail with smart cropping using transform_image
- Review the crop and ask for adjustments if the wrong area was focused
- Batch-generate thumbnails for your entire image library
Example Prompt
Try this with Claude using the Image Ops tool
Generate 300x200 thumbnails from all our blog hero images. Use smart cropping to keep the most interesting part of each image.
Tips
- Ask Claude to generate thumbnails at multiple sizes -- small, medium, and large
- Request center-crop, top-crop, or smart-crop based on your content type
- Claude can generate both square and rectangular thumbnails from the same source