px0 Released: Ultra-Lightweight Code Navigation and Review in the Browser

px0 is an ultra-lightweight, remote-first IDE designed to allow instant code navigation and review directly in the browser. With a boot time of less than 1ms and RAM usage of only about 20MB, it can quickly handle large codebases without the heavy indexing or background processes found in tools like VS Code.

Key Features

• Ultra-fast navigation: Maintains the same speed when opening a 400,000-line file as it does for a 10-line file, efficiently managing memory through a virtual DOM.
• Remote-first architecture: Boots in less than 1ms on remote servers or cloud instances, allowing direct access from the browser without port forwarding or SSH key setup.
• AI agent integration: After selecting code, users can invoke external coding agents such as Claude Code, OpenCode, and Cursor Agent via right-click or shortcuts to perform edits.
• Rich features: Offers syntax highlighting for approximately 280 languages, visual Git diff viewing, symbol-based search, and LSP (Language Server Protocol) support.
• Self-contained: Provided as a single static binary without runtime dependencies like Electron or Node.js, ensuring privacy by having no cloud phone-homes.