JSON Formatter

Makes JSON easy to read. Open source.

JSON Formatter: Chrome Extension for Easy JSON Readability

"JSON Formatter" is a user-friendly Chrome extension designed to simplify the reading of JSON by automatically formatting it when loaded in a browser. It offers convenient features such as syntax highlighting, collapsible trees with indent guides, clickable URLs, and a dark mode. Despite its feature richness, it has negligible performance impact on non-JSON pages. Moreover, it respects user privacy with no tracking or advertisements.
Download
Install from Chrome Web Store

Extension stats

Users: 2,000,000+
Rating: 4.59
(1,868)
Version: 0.7.3 (Last updated: 2024-03-28)
Creation date: 2020-04-20
Risk impact: Moderate risk impact
Risk likelihood:
Very low risk likelihood
Manifest version: 3
Permissions:
  • storage
Host permissions:
  • *://*/*
  • <all_urls>
Size: 20.34K
URLs: Website

Ranking

# 284 ▼ 13
Other rankings
#3 in Developer Tools #2 in json keyword 20 #12 in format keyword 4 ▼ 1 #64 in source code keyword 11 ▲ #280 in features keyword 34 ▼ 33

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge
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Extension summary

Analyze keywords

The original JSON Formatter, now with optional dark mode 🌚

Auto-formats JSON when you load it in a browser tab.

FEATURES

  • Fast, even on very long JSON pages
  • Dark mode
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Negligible performance impact on non-JSON pages (less than 1 millisecond)
  • Works on any valid JSON page – URL doesn't matter
  • Buttons for toggling between raw and parsed JSON
See more

User reviews

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 Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Very helpful for reading and formatting JSON
  • Works effectively for developers
  • Intuitive and easy to use
  • Transforms messy JSON into readable format
  • Indispensable tool for anyone working with JSON data
Cons
  • Conflict with built-in Chrome pretty print feature
  • Occasionally grayed out and not functioning
Most mentioned
  • Helps with readability of JSON
  • Essential for developers
  • Simple and efficient design
User reviews
Great tool, highly recommend!
by Alexander Gerber, 2025-01-16
helpfull for anyone who tries to read JSON
by Miiro Lernokil, 2024-12-27
A must for developers
by Kikos Moktaki, 2024-12-25
View all user reviews

Extension safety

Risk impact

JSON Formatter requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

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

Upgrade to see risk analysis details

Promo images

JSON Formatter small promo image
Small promo image

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