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3 Ways to Fix your JSON Viewer If It’s Not Working in Firefox

The server might not send a valid Application/JSON header properly

5 min. read

Updated onOctober 20, 2023

updated onOctober 20, 2023

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Key notes

JSON, otherwise JavaScript Object Notation, data is a protocol for browser/server communication and one of the primary alternatives toXML.

However, JSON data is not readable by developers without a JSON viewer that structures and displays the data in a clear way. As such, Mozilla has incorporated aJSON viewerinFirefox.

How do I view JSON inFirefox? The quickest way to view and edit JSON data inFirefoxis through its integrated JSON viewer. The data viewer is enabled by default only in the Developer Edition and Nighly. If that doesn’t suit you, use some useful add-ons and web tools forFirefox.

Why is JSON viewer not working in Firefox?

The native JSON viewer on Firefox may not work correctly for various reasons. It may be any of the following ones:

What is the best JSON viewer?

Most JSON viewers are great. It is hard to determine which one is best. However, if you want to view JSON online, you may consider usingJSONViewer.Stack.Hu.

Whatever the reason is, you can always fix JSON-related problems on Firefox by yourself.

For more information about that, check the guide below.

Note: The following steps are equally helpful if you are looking for the following issues:

How do I fix JSON viewer on Firefox?

How do I fix JSON viewer on Firefox?

1. Consider using a different browser

Before trying any of the troubleshooting solutions below, we would first like to suggest that you consider using a different browser entirely.

For example,Opera Oneis an excellent choice if you are interested in JSON Viewer since it also comes with its own JSON extension, JSONLite.

The browser has proven far more stable and reliable than the Firefox variant. More so, Opera One is a great web browser, featuring an incredibly modern UI with high levels of customization.

It has a built-in VPN and ad-blocker, and it is based on the Chromium engine, making it compatible with extensions from both Chrome and Edge.

Opera One

2. Enable JSON Viewer in Firefox

IfFirefox’s JSON viewerisn’t working for you, that may be because it’s not enabled. At the moment, the data viewer is only enabled by default in Developer Edition and Nightly.

3. Try alternative JSON Viewer add-ons and web tools

This extension filters JSON syntax and structures it so you can easily read the data in Firefox.

The JSON-DataView also includes customization options that you can select by following the steps below:

TheJSON Editor Onlineis another web tool to display data from HDD or URL. You need to open the web tool and copy-paste the sample data above into the code editor.

Press the right arrow button to copy the code into the tree editor, and then click the left arrow button to display the JSON data, as shown below. There, you can edit the data and save any changes made.

The page also includes a handy search tool for fields and values.

How do I make a JSON file readable?

A raw JSON file can confuse anyone. If you want to see a JSON file in human-readable format, you must use a JSON viewer. The Mozilla Firefox browser is an excellent tool to do it.

However, alternatively, you can useNotePad, NotePad++, and many other offline software and JSON viewers to make JSON files readable.

The built-in Firefox viewer doesn’t do everything you need if you need a JSON viewer. JSON addons, web tools, and extensions for Firefox are great alternatives for developers who need to open and edit JSON data.

Hope that this was helpful and you’re now aware of the different JSON add-ons and web tools you can use. If you have any more questions, feel free to reach for the comments section below.

More about the topics:Firefox errors,web software

Matthew Adams

Windows Hardware Expert

Matthew is a freelancer who has produced a variety of articles on various topics related to technology. His main focus is the Windows OS and all the things surrounding it.

He is passionate about the tech world, always staying up-to-date with the latest and greatest. With an analytical view, he likes problem-solving, focusing on errors and their causes.

In his free time, he likes to read and write about history and tries to always develop new skills.

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Matthew Adams

Windows Hardware Expert

He is passionate about everything surrounding Microsoft’s OS, focusing on troubleshooting guides & tips for everyday problems.