A Firefox and Chrome extension that pretty-prints JSON data.

May 17, 2025 - Download JSONView for Firefox. View JSON documents in the browser.

January 24, 2024 - Download JSON Viewer Pro for Firefox. JSON Viewer lets you visualize a JSON in your browser.

5 days ago - As Firefox already has an inbuilt JSON Formatter, you need to disable it for this extension to work. To do so, go open "about:config", search "devtools.jsonview.enabled", make it "false" to disable the default JSON Formatter and you are ready to go. For more info, check out Disabling JSON Viewer in Firefox You can toggle between modes using shortcut keys: Parsed Mode: P key Formatted Raw Mode: Shift + R key Raw Mode: R key Toggle Dark Mode: D key Toggle Toolbar: T key Features: - Over 60 themes for both light and dark mode - Syntax highlighting - Works offline - No tracking or analytics - Word

2 weeks ago - Note: To use this JSON viewer and ...er.mozilla.org/en-US/docs/Tools/JSON_viewer -- This extension monitors JSON pages and converts them into a human-readable object....

November 9, 2025 - Download Virtual Json Viewer for Firefox. JSON browser extension with virtual DOM, search and JQ filtering

March 3, 2021 - Download JSON Lite for Firefox. Fast JSON viewer - highlights, shows items count/size, handles large files

This is a port of Firefox's JSON Viewer If you open a JSON file in the browser, it is parsed and given syntax highlighting. Arrays and objects are shown collapsed, and you can expand them using the "+" icons.

May 20, 2024 - Download JsonDiscovery for Firefox. Browser extension that changes the way you're viewing JSON

March 4, 2023 - Download JSON Formatter + Viewer for Firefox. JSON Formatter + viewer It's short, memorable, and captures the essence of what the extension does - it makes JSON data on web pages easier to read and understand.

Port of Firefox's JSON Viewer for Chromium-based Browsers - pd4d10/json-viewer

November 14, 2025 - Download JSON Viewer for Firefox. A modern UI for viewing and manipulating JSON

May 4, 2021 - Download MJsonViewer for Firefox. Yet, just another json content viewer plugin for Firefox. Before using, you should go to the "about:config" page and toggle the "devtools.jsonview.enabled" to false first.

Firefox includes a JSON viewer. If you open a JSON file in the browser, or view a remote URL with the Content-Type set to application/json, it is parsed and given syntax highlighting.

December 17, 2020 - Download HAR/JSON viewer for Firefox. Embedded HAR/JSON viewer. Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view.

Normally, when encountering a JSON document (content type application/json), Firefox simply prompts you to download the view. With the JSONView extension, JSON documents are shown in the browser similar to how XML documents are shown.

October 7, 2025 - ✨ Features 🎨 Beautiful JSON Formatting: Syntax highlighting with collapsible objects and arrays 🔍 Auto-Detection: Automatically detects JSON content on web pages 🌙 Dark/Light Theme: Toggle between light and dark themes 📋 Copy to Clipboard: Easy copying of formatted JSON data 📊 JSON Analysis: Shows object count, array count, and file size ⚡ Real-time Validation: Instant JSON validation and error reporting 🎯 Context Menu Integration: Right-click options for JSON operations 🔧 Customizable Settings: Auto-format, syntax highlighting, and collapsible options ⚡ Works on any

:fire: A Chrome extension to visualise JSON response and introduce awesome JSON prettifying experiences.