JSON Viewer

JSON Viewer

The most beautiful and customizable JSON/JSONP highlighter that your eyes have ever seen. Open source at https://goo.gl/fmphc7

  • JSON Viewer
  • JSON Viewer
  • JSON Viewer
  • JSON Viewer
  • JSON Viewer
What is JSON Viewer?
"JSON Viewer" is a feature-rich Chrome extension designed to make it easier to view, format, and debug JSON data. With 27 built-in themes, optional clickable URLs, ability to inspect your JSON data, C-style braces and arrays option, and an intuitive scratch pad, you get an ultimate tool for handling JSON. It enables users to customize their themes, tab size, and maximum JSON size to highlight. The extension is part of an open-source project and is continually improved by dedicated contributors.
By: tulios
Users: 1,000,000+
Rating: 4.54 (1,072)
Version: 0.18.1 (Last updated: 2020-12-23)
Creation date: 2017-10-23
Risk impact: Moderate risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • *://*/*
  • <all_urls>
Size: 317.44K
Stats date:

Other platforms

Not available on Firefox
Not available on Edge
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Chrome-Stats extension

It is a Chrome extension for printing JSON and JSONP.


  • This extension might crash with other JSON highlighters/formatters, you may need to disable them
  • To highlight local files and incognito tabs you have to manually enable these options on the extensions page
  • Sometimes when the plugin updates chrome leaves the old background process running and revokes some options, like the access to local files. When this happen just recheck the option that everything will work again
  • Works on local files (if you enable this in chrome://extensions)


  • Syntax highlighting
  • 27 built-in themes
  • Collapsible nodes
  • Clickable URLs (optional)
  • URL does not matter (the content is analysed to determine if its a JSON or not)
  • Inspect your json typing "json" in the console
See more
User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Great tool for viewing large JSON content
  • Fast and reliable handling of very large files
  • Useful for viewing JSON files in web browser
  • Confusing setup for some users
  • Does not work on Edge browser
  • Some users had trouble understanding usage instructions
Most mentioned
  • Great tool for viewing large JSON content
  • Does not work on Edge browser
Recent reviews
great tool to view large JSON content
by Oleh Ismailov Oleh Ismailov, 2024-07-10

Great options and great display of JSON in the browser
by Newt Fourie Newt Fourie, 2024-07-03

by momo chen momo chen, 2024-07-02
View all user reviews
Risk impact

JSON Viewer may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.

Risk likelihood

JSON Viewer has earned a good reputation and can be trusted.

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