In Browser Code Execution And Preview

via “real-time-component-preview-with-iframe-sandboxing”

OpenUI let's you describe UI using your imagination, then see it rendered live.

Unique: Implements strict iframe sandboxing with restrictive sandbox attributes and postMessage-based communication, preventing XSS attacks from LLM-generated code while maintaining real-time preview updates and component inspection capabilities

vs others: More secure than rendering components directly in the DOM because iframe sandboxing isolates untrusted code and prevents style/script injection, whereas direct rendering risks XSS and CSS conflicts with the main page