How to Generate Thumbnails with OpenClaw
Generate thumbnails with OpenClaw and ToolRouter. Consistent preview images for any content.
Tool
OpenClaw automates thumbnail generation at scale, processing hundreds of source images into consistent thumbnails with smart cropping in a single batch. Output includes multiple thumbnail sizes per source, organized by resolution, with metadata tracking crop coordinates and source file references for complete traceability.
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 toolsSteps
Once connected (see setup above), use the Image Ops tool:
- Ask OpenClaw: "Generate a thumbnail from this image at 300x300"
- OpenClaw creates the thumbnail with appropriate cropping
- Review and request adjustments to the crop if needed
- Batch-generate thumbnails for your entire content library
Example Prompt
Try this with OpenClaw using the Image Ops tool
Generate 250x250 square thumbnails for our product catalog images.
Tips
- Standardize thumbnail dimensions across your entire platform
- Test thumbnails at their actual display size to ensure they look good small
- Generate both retina and standard resolution thumbnails for high-DPI devices