JSONView

Name: JSONView
Rating: 4.1235 (81 reviews)
Author: Ben Hollis

By: Ben Hollis

View JSON documents in the browser.

Download

Install

Features & Capabilities

JSONView is a handy Chrome extension that formats and highlights JSON documents directly in your browser. It transforms raw JSON text into a clean, easy-to-read layout, allowing users to collapse arrays and objects for better navigation and clarity. Even if the JSON contains errors, JSONView ensures that the raw text is still visible, making it invaluable for developers and data professionals.

While Firefox includes a built-in JSON viewer, JSONView offers a customizable alternative that enhances readability and user experience. Simply install JSONView and visit JSON document links to see formatted, highlighted JSON instantly. This tool streamlines the process of inspecting JSON data without the need for external software or online tools.

User Growth & Download Statistics

Add-on Developer Tools Programming

By:

Daily users:

Rating:

Version:

3.2.0 Last updated: 2025-05-26

Version code:

5950499

Creation date:

2009-02-23

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

<all_urls>

Size:

82.98KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-14

Compare stats and ranking:

Ranking

# 546 ▲ 4

Other rankings

#45 in Web Development

#10 in documentation keyword 44 ▼ 1

#12 in json keyword 60

#19 in document keyword 43 ▲ 2

#38 in song keyword 59 ▼ 1

Upgrade to see more rankings

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Ben Hollis

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/jsonview/

Website:

https://github.com/bhollis/jsonview/issues

Permission Change History

2024-06-19: Version 2.6.1 → 3.0.0

Add Host permissions: <all_urls>

Add Permissions: storage

Remove Permissions: <all_urls>

2024-01-03: Version 2.5.0 → 2.6.1

Add Permissions: webRequestBlocking

2023-12-18: Version 2.4.3 → 2.5.0

Remove Permissions: webRequestBlocking

User Reviews

Pros

Super easy to use
Nice, easy to read interface
Ability to collapse/expand JSON elements

Cons

Recent update introduced incorrect rounding of small numbers
Plugin makes requests on all URLs contained in JSON, leading to potential security issues

Recent reviews

by 退出*****, 2025-03-27

by 远离*****, 2025-02-12

As of the recent update I've noticed a rather breaking change. My API returns json with very small numbers: eg "transform": [ 4.371139e-8, 1.080646e-7, ] As of the recent update, this now shows up as: "transform" [ 4, 1 ] Which is totally wrong, if you round to 0 it would be more acceptable, but rounding to 4 and 1 in this case is totally wrong and actually caused me to have a panic attack this morning thinking all our data was suddenly corrupt. Could you please provide a patch fix for this soon, as I love the other features of this plugin. EDIT: looks like you already noticed: https://github.com/bhollis/jsonview/commit/a6692b8d20b6d88524395887e66e25ee7757e2bd 41 minutes ago haha

by Fi*****, 2024-06-19

View all user reviews ›

Is JSONView Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

JSONView requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

JSONView has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******