Latest, 15 Oct 2026:2,000,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 3 years
Latest, 15 Oct 2026:2,086 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About JSON Formatter
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
- FIXED: Exports the parsed JSON to window.json so you can explore it in Dev Tools
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 out 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
Growth
Window
Users
Change
Ratings
Rating
7 days
0
+0.0%
0
−2.76
30 days
0
+0.0%
−1
−2.76
6 months
0
+0.0%
+47
−2.83
1 year
0
+0.0%
+191
−3.07
Chrome Web Store search rankings
Where JSON Formatter appears when people search the store, with the 30 day change