Readable JSON Viewer

Readable JSON Viewer transforms raw JSON responses into a clean, code-editor-like tree view directly in your browser tab.

Whether you're working with REST APIs, inspecting local files, or debugging backend responses, this extension makes JSON instantly readable — even with files containing thousands of lines. Features: ⚡ Zero configuration — Works automatically on any URL that returns JSON, whether detected by content type or .json file extension. 🌲 Collapsible tree view — Click any object or array to fold or unfold it. Collapse everything at once with a single click or Cmd/Ctrl+X. 🎨 Syntax highlighting — Keys, strings, numbers, booleans, and null values are color-coded for faster scanning. 🔢 Smart line numbers — Line numbers stay in sync when nodes are collapsed, always reflecting the original JSON structure. 🔍 In-page search — Press Cmd/Ctrl+F to open the search bar. Navigate matches with the arrow keys or Enter/Shift+Enter. 🌗 Light & dark themes — Automatically follows your system preference, with a manual toggle available anytime. 📋 One-click copy — Copy the full formatted JSON to your clipboard with one click. Also available via Cmd/Ctrl+C when no text is selected. 🚀 Fast & lightweight — Handles even the largest JSON files with thousands of lines without slowing down.