Canvas — build UIs from JSON specs with live preview

Generate, edit, and export interactive UI specs as JSON with live preview. Export the result as a PDF or image. Powered by LLM Gateway.

Iterate on UI layouts by editing a JSON spec with live preview.
Use any of 210+ supported models to generate or modify canvas specs.
Export the canvas to PDF or PNG for sharing.

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JSON Spec

Preview

Hello Canvas

Edit the JSON on the left to build your UI. Use the templates above for inspiration.