core.ai

Categories: Coding & Developer Tools | Pricing: Free | Official Website ↗

core.ai develops Phoenix Code, an AI-powered code editor that understands both design and code with visual context.

core.ai is a company that builds AI-first tools for web developers. Their flagship product, Phoenix Code, is an open-source code editor designed to understand both design and code. It provides a live preview, Git integration, and extensions across multiple platforms. Phoenix Code integrates AI, specifically Claude Code, with visual and runtime context. Unlike most AI coding agents that only read source code, Phoenix Code's AI analyzes the rendered page, seeing what the browser displays rather than just interpreting stylesheets or code. Users can bring their own Claude login or key, and code remains local. The editor is a native application available on Windows, macOS, and Linux, offering fast performance. core.ai also stewards Brackets, the classic open-source editor, while Phoenix Code advances its vision.

Key Features

AI editor with visual context (Claude Code)
Responsive preview for multiple layouts
Markdown editor
Integrated terminal
Design mode for direct page editing
Live preview
Git integration
Extensions support

Pros

AI understands design and code visually
Free and open-source software
Native application for fast performance
Supports multiple platforms (Windows, macOS, Linux)
Includes essential developer tools (Git, terminal, live preview)
Code stays local for privacy

Cons

Requires user to bring their own Claude login/key
Specific AI model (Claude Code) dependency
Limited information on community support or advanced features beyond core offering
No explicit mention of mobile development support
Relatively new compared to established editors

Use Cases

Building and editing web applications
Developing responsive web designs
Collaborating on code with Git
Writing and previewing Markdown documents
Debugging and running commands within the editor

Best For

Web developers
Front-end developers
Design-focused developers
Developers using Claude AI

Integrations: Claude Code, Git

Platforms: Web, macOS, Windows, Linux

Watch demo on YouTube ↗

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