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OpenAI•June 12, 2026
Developer Mode
Free
OpenAI
Codex
Developer Tools
In-app Browser
### TL;DR
OpenAI's Codex app introduces an in-app browser with Developer Mode, enabling developers to preview and comment on web applications directly within the Codex environment. This feature facilitates efficient debugging and development by allowing real-time interaction with web pages without the need for external browsers.
Key Insights & Metrics
Pricing
Free
Cost structure
Version
26.609
Current release version
Hardware
Compatible with systems running the Codex app
Compute requirements
Category
Free
Licensing model
Region
United States
Primary region
Key Features
- In-app browser for web page preview and commenting
- Developer Mode with full Chrome DevTools Protocol (CDP) access
- Real-time interaction with web pages without external browsers
- Explicit approval required for full CDP access
- Designed for local development servers, file-backed previews, and public pages
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