JSON Formatter

by Callum Locke

Developer tools json-formatter developer-tools syntax-highlighting code-formatting productivity browser-extension open-source dark-mode

Quick Look

Effortlessly read and navigate any JSON with this fast, user-friendly, open-source formatter featuring syntax highlighting and optional dark mode.

AI Overview

Who is this for?

Developers and users who frequently work with JSON data in their browser.

Key Features

→ Auto-formats JSON in browser tabs
→ Optional dark mode
→ Syntax highlighting
→ Collapsible trees with indent guides
→ Toggle between raw and parsed JSON

Reviews Analysis

Overall Sentiment

Mostly Positive

Users find the JSON formatter highly effective and easy to use, praising its speed, dark mode, and readability features, though some mention occasional conflicts with other extensions.

Note: AI analysis focuses on the substance and recency of reviews, which may differ from the overall store rating.

What Users Love

✓ Makes JSON easy to read and navigate
✓ Fast performance and optional dark mode
✓ Collapsible trees and clickable URLs

Points to Consider

× May clash with other browser extensions
× Occasional issues reported (though troubleshooting is provided)

"Makes JSON easy to read."
— A Positive User Review

"Fast, even on very long JSON pages"
— A Positive User Review

"Note: this extension might clash with other browser extensions that modify the DOM before it runs. If it doesn't seem to be working, try disabling other extensions."
— A Critical User Review

Official Description

From the Developer

Makes JSON easy to read. Open source.

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

Note: this extension might clash with other browser extensions that modify the DOM before it runs. If it doesn't seem to be working, try disabling other extensions. If it clashes with an extension you need, open an issue and I'll try to find a solution.

SOME EXAMPLE JSON PAGES to try it on: https://callumlocke.github.io/json-formatter/

PRO TIP Hold down control (or cmd on Mac) while collapsing a tree - collapses all siblings too.

PRIVACY No tracking, no advertising, and nothing else nefarious.

SOURCE CODE github.com/callumlocke/json-formatter

ISSUES github.com/callumlocke/json-formatter/issues

WHO MADE THIS twitter.com/callumlocke

Your extension? Let us know if we can update or correct anything!