---
title: ToolRouter — Use Case
description: Step-by-step guide for a real-world ToolRouter use case with agent-specific instructions.
url: https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails
---
# Generate Thumbnails

Thumbnails are the first visual impression of your content -- in search results, social media feeds, email previews, and content galleries. A poorly cropped or inconsistently sized thumbnail undermines the professional appearance of your entire platform. Yet generating quality thumbnails at scale is surprisingly difficult because it requires intelligent cropping decisions about what part of each image to preserve at a small size.

ToolRouter's transform_image skill generates thumbnails with smart cropping that preserves the most important part of each image. You specify the target thumbnail dimensions, and the tool handles the resize and crop to produce a visually appealing result. This works for product thumbnails, blog post previews, video thumbnails, and any context where small preview images represent larger content.

Consistent thumbnails dramatically improve the visual coherence of listings, galleries, and feeds. When every thumbnail is the same size and properly cropped, your content looks curated and professional. When thumbnails are random sizes with awkward crops, even great content looks amateurish.

**Tool:** [Image Ops](https://toolrouter.com/tools/image-ops)
**Skills:** transform_image

## Agent Guides

- [How to Generate Thumbnails with Claude](https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails/claude): Guide for Claude
- [How to Generate Thumbnails with ChatGPT](https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails/chatgpt): Guide for ChatGPT
- [How to Generate Thumbnails with Copilot](https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails/copilot): Guide for Copilot
- [How to Generate Thumbnails with OpenClaw](https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails/openclaw): Guide for OpenClaw
