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Open source JSON viewer for Chrome that makes JSON and JSONP responses much easier to read, explore, and debug. Whether you're working with APIs, inspecting responses in the browser, or just trying to make sense of raw JSON data, this extension gives you a cleaner and more developer-friendly way to view structured data right in Chrome. ✨ Features: • JSON & JSONP support • Syntax highlighting • Collapsible trees with indent guides • Clickable URLs • Copy and Download JSON data • Toggle between raw and parsed JSON 🛠 Perfect for: • Developers working with APIs • Debugging JSON responses in the browser • Quickly exploring nested objects and arrays • Making large JSON payloads easier to scan 📦 Why use it? Raw JSON in the browser can be hard to read and navigate. This extension transforms JSON into a structured, interactive view so you can inspect data faster and with less friction. 🌍 Open source: https://github.com/timleland/Json-Viewer-Extension
JSON Formatter Pro
Beautiful JSON viewer with sidebar — search, copy paths, export, pin nodes, and history. In 2026, handling JSON data doesn’t have to be a hassle. JSON Formatter Pro is a browser extension that automatically detects and formats JSON data on webpages, turning raw responses into a clean, interactive viewer. Instead of reading unformatted JSON, you can explore data in a structured tree view that makes nested objects and arrays easier to understand. This helps when reviewing API responses, debugging data, or inspecting JSON documents directly in the browser. Automatic JSON Detection Automatically detects JSON responses on supported pages and opens them in a structured viewer. Interactive Tree View Browse JSON data in an expandable and collapsible tree layout. Search Inside JSON Search keys and values within large JSON responses. You can: • find specific fields quickly • highlight matching results • move through large datasets more easily JSON Path Generator Generate JSONPath for selected nodes to help with inspection and debugging. Copy Tools Copy useful data directly from the viewer, including: • key • value • path • object Pinned Nodes Pin important fields for quicker access while inspecting large responses. History Tracker View recently opened JSON responses with details such as: • page URL • JSON size • timestamp Size Analyzer See response size information such as bytes, KB, or MB for quick payload inspection. Dark and Light Theme Choose the appearance that feels most comfortable during use. Works Across Websites Use the extension on supported webpages that return JSON content, including local development environments. Lightweight and Fast Designed to stay responsive while viewing large JSON responses. Privacy JSON Formatter Pro does not collect or sell personal data. Processing happens locally in the browser. Why Use JSON Formatter Pro JSON Formatter Pro helps make raw JSON easier to read, search, inspect, and export without leaving the page. The main issue was the “Who Should Use This Extension” section because Chrome Web Store often treats role-stuffing as keyword spam. Remove that whole block and keep the description focused on actual functionality.
JSON Beautifier and Editor
Display JSON objects by transforming them into Syntax editable highlighted HTML to validate, format, and save This extension monitors JSON pages and converts them into a human-readable object. You can view, edit, search through values and keys. You can even change the format of a key or drag it into a new place. There is no need to do anything after installation. Just open a JSON page and the extension automatically converts the page into the editor mode. As of version 0.2.0, the extension uses a dark theme if your browser's default theme is dark. FEATURES ► Supports both JSON & JSONP formats ► Has light and dark syntax highlighting themes ► Supports collapsible trees ► Converts text links into clickable URLs ► Supports raw, code, and parsed JSON views ► Keeps expanded structure when refreshing the JSON page ► Copy Object Path ► Copy Outer JSON ► Copy Inner JSON ► Open a new editor to write a new JSON object ► Open a new editor from selection text (right-click context menu) ► Supports large numbers (BigInt, BigFloat, ...) Change Logs: 0.1.3: 1. It is now possible to beautify local (file://) JSON files. 2. Extension now uses "persistent = false" background page (event page) to have no performance effect when it is not used. 0.1.6: 1. It is now possible to change the view mode to "Tree", "Code", and "Text" modes. The coding mode is useful to edit the raw JSON, and the text mode is useful to copy the raw data. The default view is the tree view which displays the JSON in a formatted and highlighted format.
JSON Formatter
Formats JSON automatically! Open Source, Available with 60+ Themes, Syntax Highlighting, automatically linkifies links and more. JSON Formatter automatically formats and prettifies JSON in Chrome. It comes with support for syntax highlighting and over 60 themes. It also makes links clickable automatically and has multiple modes to view JSON, including Parsed Mode, Formatted Raw Mode, and Raw Mode. You can toggle between modes using shortcut keys: Features: ● Over 60 themes for both light and dark mode ● Syntax highlighting ● Works offline ● No tracking or analytics ● Word wrapping and sorting order to stay organized ● Works with any JSON webpage ● Supports excluding domains from formatting ● Makes links clickable ● Formats JSON automatically ● Raw, Formatted Raw, and Parsed Mode ● Remembers theme preferences ● Shortcut keys for ease of use ● Collapsible toolbar Note: By default, the extension theme is "System Default." It will change according to your browser's theme. If you want it to be the theme of your choice, you have to set it from the "Extension Settings" or "Extension Options." To change the default formatting option and other settings, set your desired option in the extension settings. To make JSON Formatter work properly on all kinds of sites, in the extension permissions, change "Allow this extension to read and change all your data on websites you visit" from "On Click" to "On all sites," if not already set. To use JSON Formatter in local files, enable "Allow access to file URLs" in the extension settings. To use JSON Formatter in Incognito mode, enable "Allow in Incognito" in the extension settings. Bug reports and suggestions: https://github.com/arnav-kr/json-formatter/issues
Functional JSON viewer
Modern JSON formatter and explorer.
