How to Batch Resize Images with ChatGPT
Resize images in bulk with ChatGPT and ToolRouter. Consistent dimensions for your entire image library.
Tool
ChatGPT makes image resizing accessible to non-technical team members by accepting natural language instructions and returning results with clear explanations. It generates a dimensions guide alongside the resized images, documenting the exact specifications used so your design team can maintain consistency for future uploads.
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
Steps
Once connected (see setup above), use the Image Ops tool:
- Ask: "Resize this image to 1080x1080 for Instagram using image-ops"
- ChatGPT processes the resize and returns the result
- Request: "Now resize it for Twitter header (1500x500) and Facebook cover (820x312)"
- Ask for a batch resize of multiple images to your standard dimensions
Example Prompt
Try this with ChatGPT using the Image Ops tool
Resize this photo for all social media platforms. Give me Instagram square, Twitter header, and LinkedIn banner versions.
Tips
- ChatGPT knows the standard dimensions for every major social platform
- Ask for a dimension cheat sheet alongside the resized images
- Request quality comparisons between different resize methods