If you need only a nice viewer/parser I can recommend good ol JSON Formatter , really handy addon which also gives you easy access to elements with json in console. There is also a newer fork of it with some color themes and visual features, but because of it loading bigger JSON files can take much longer (or even crash the tab). Answer from brown59fifty on reddit.com
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Jsonview
jsonview.com
JSONView - View JSON in Firefox and Chrome | BenHollis.net
Pretty JSON in your browser Β· Add to Firefox Add to Chrome Add to Edge Β· Change Log | Contribute Β· (click to test it out) Pretty-prints JSON instead of prompting to download it or rendering it as text. Collapsible array and object sections for easy navigation.
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GitHub
github.com β€Ί pd4d10 β€Ί json-viewer
GitHub - pd4d10/json-viewer: Port of Firefox's JSON Viewer for Chromium-based Browsers
Port of Firefox's JSON Viewer for Chromium-based Browsers - pd4d10/json-viewer
Starred by 249 users
Forked by 32 users
Languages Β  JavaScript 69.4% | TypeScript 29.9% | CSS 0.7% | JavaScript 69.4% | TypeScript 29.9% | CSS 0.7%
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Chrome Web Store
chromewebstore.google.com β€Ί detail β€Ί json-viewer β€Ί efknglbfhoddmmfabeihlemgekhhnabb
JSON Viewer - Chrome Web Store
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.
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Better Programming
betterprogramming.pub β€Ί easy-to-read-json-with-this-chrome-firefox-extension-29f4938dce50
Easy-to-Read JSON With This Chrome/Firefox Extension | by Fatos ...
August 12, 2019 - It also works with local files, after you enable it in chrome://extensions. You can inspect the JSON by typing json into the console. You can install the extension by going here for Chrome and here for Firefox and then test it, for example, by visiting this API response.
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Mozilla Add-ons
addons.mozilla.org β€Ί en-US β€Ί firefox β€Ί addon β€Ί jsonview
JSONView – Get this Extension for 🦊 Firefox (en-US)
May 17, 2025 - JSONView was built to display JSON documents in an easy to read format, which is still nice if you don't like the default viewer. The document is formatted, highlighted, and arrays and objects can be collapsed.
Rating: 4.1 ​ - ​ 81 votes
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Chrome-Stats
chrome-stats.com β€Ί developer tools β€Ί json viewer
JSON Viewer: A Chrome Extension for Displaying JSON Files
May 27, 2018 - JSON Viewer is highly praised for its reliable and user-friendly interface resembling Firefox's JSON viewer, supporting large payloads and offering useful features like search, save, and theming.
Rating: 4.6 ​ - ​ 50 votes
Find elsewhere
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GitHub
github.com β€Ί discoveryjs β€Ί browser-extension-json-discovery
GitHub - discoveryjs/JsonDiscovery: A browser extension (Chrome, ...
A browser extension (Chrome, Edge, Firefox) that changes the way you're viewing JSON - discoveryjs/JsonDiscovery
Starred by 358 users
Forked by 15 users
Languages Β  JavaScript 85.5% | CSS 8.2% | Swift 4.0% | HTML 2.3%
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GitHub
github.com β€Ί bhollis β€Ί jsonview
GitHub - bhollis/jsonview: A web extension that helps you view JSON documents in the browser. Β· GitHub
JSONView is a Web extension compatible with Firefox and Google Chrome that helps you view JSON documents in the browser.
Starred by 1.7K users
Forked by 230 users
Languages Β  TypeScript 67.8% | JavaScript 23.0% | CSS 6.5% | Shell 2.7%
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Softonic
json-viewer-6me.en.softonic.com β€Ί home β€Ί web browsers β€Ί browsers β€Ί google chrome β€Ί json viewer
JSON Viewer for Google Chrome - Extension Download
March 28, 2024 - JSON Viewer is a Chrome add-on developed by Rongjian Zhang. As a port of Firefox's JSON Viewer, this program allows users to easily parse and view JSON files directly in the browser.
Rating: 9.2/10 ​ - ​ 1 votes
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Chrome Web Store
chromewebstore.google.com β€Ί detail β€Ί json-viewer-pro β€Ί eifflpmocdbdmepbjaopkkhbfmdgijcc
JSON Viewer Pro - Chrome Web Store
Core features: βœ… Beautify JSON response from API βœ… Visual representation of JSON with Chart βœ… Depth traversing of JSON property using breadcrumbs βœ… Access or Traverse via JSON Path navigation Prompt βœ… Write custom JSON in Input area βœ… Configurable Content-Type and JSON Content Detection βœ… Ignore particular websites or URLs from rendering βœ… Import local JSON, YAML and XML files supported βœ… Download JSON file using Context Menu βœ… Dark and Light theme supported βœ… Custom CSS supported βœ… Intuitive User Interface βœ… Copy path of any property and value easily βœ… Access JSON in your console using only json keyword #Keywords: jsonFormatter, JSON, JSONChart, JSONViewer, JSONPlayground, JSONEditor, JSONView
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JSON Viewer
jsonviewer.stack.hu
Online JSON Viewer and Formatter
Read more: json.org, wikipedia, google In JSON, they take on the following forms: object, array, value, string and number. Several users reported slow loading speed in Chrome, but I couldn't figure out why. If you have any hints, please get in touch. I've done some tests and looks like Firefox ...
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GitHub
github.com β€Ί tulios β€Ί json-viewer
GitHub - tulios/json-viewer: It is a Chrome extension for printing JSON and JSONP. Β· GitHub
It is a Chrome extension for printing JSON and JSONP. - tulios/json-viewer
Starred by 3.5K users
Forked by 726 users
Languages Β  HTML 42.2% | JavaScript 31.2% | CSS 14.4% | SCSS 12.2%
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Medium
medium.com β€Ί @ecastille924 β€Ί super-helpful-chrome-extension-for-json-data-f8a735c96bf4
Super Helpful Chrome Extension for JSON data | by Erick Castille | Medium
February 12, 2022 - One thing I realized that I had been taking for granted was a super helpful Chrome extension that makes viewing/ understanding JSON data way easier: JSONView. There are a ton of free APIs full of JSON data out there, but sometimes, especially for new developers, it can be hard to make sense of them. They can look like like an overwhelming jumble of nonsense that seems impossible to navigate.
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Reddit
reddit.com β€Ί r/webdev β€Ί chrome extension json viewer
r/webdev on Reddit: Chrome extension JSON viewer
February 14, 2024 -

In case anyone else is needing a way to view large JSON files (10MB+), I wrote this extension for Chrome:

https://chromewebstore.google.com/detail/json-navigator/glgilclfmgofaeffphalkglkgbbpmigf

It loads large JSON files faster than Chrome can generate the preformatted text (by a long shot), and has a lot of useful features that make finding the needles in the haystack easier.

Enjoy :)

Live demo: https://r55man.com/json-navigator/