---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/image-ops/use-cases/generate-thumbnails/chatgpt
---
# How to Generate Thumbnails with ChatGPT

ChatGPT generates thumbnails with platform-aware recommendations, suggesting optimal sizes for different display contexts and explaining how smart cropping decisions affect visual appeal. It produces a thumbnail style guide alongside the processed images, ensuring your content team maintains consistency across all future thumbnail creation.

## Setup

{"mcpServers":{"toolrouter":{"command":"npx","args":["-y","toolrouter-mcp"]}}}

## Steps

1. Configure ToolRouter in ChatGPT
2. Ask: "Create a thumbnail from this image for our product listing"
3. ChatGPT generates the thumbnail with appropriate cropping
4. Request: "Make thumbnails for all our product images at 250x250"
5. Ask for different thumbnail styles for different platforms

## Example Prompt

```
Generate thumbnails for our course catalog. Each should be 400x225 with consistent quality.
```

## Tips

- ChatGPT can recommend thumbnail sizes for different platforms and contexts
- Ask for A/B test versions with different crops of the same image
- Request thumbnail optimization for email clients where images often load slowly
