Image → JSON
Upload an image and get its data as clean JSON: name, type, size, dimensions, aspect ratio, dominant colors and average brightness, plus your optional description. Useful for developers and structured prompt builders.
image to JSON
image data
JSON prompt
image metadata
🔒 Runs inside your browser — no sign-up and your data is never sent to any service.
How to use
- Upload the image.
- Add an optional description.
- Click “Generate” and copy the JSON.
Why use this tool?
Some image generators accept structured JSON prompts. This tool gives you a base of real image data to build on, and all analysis happens in your browser.
Frequently asked questions
Does the JSON describe the image content?
Only the description you write; the tool extracts visual and technical data.
Is the image uploaded?
No, everything is local.
Can I use it as a prompt?
Yes, as the base of a structured JSON prompt — add your scene description on top.