Format and validate JSON with tree view, dark mode, instant syntax highlighting. Free, instant, no account needed.
Users
3
0 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#351K
#269K among extensions
Version
1.1.3
updated 14 May 2026
Users
monthly, 7 months
Latest, 15 Oct 2026:3 usersMove the mouse over the chart for any month
Ratings count
monthly, 7 months
Latest, 15 Oct 2026:0 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 Pro
JSON Formatter Pro automatically detects and formats JSON responses in your browser with beautiful syntax highlighting.
FEATURES:
Auto-Detection & Formatting
- Automatically detects JSON content on any page and formats it instantly
- No need to copy-paste into external tools
Syntax Highlighting
- Color-coded JSON with distinct colors for strings, numbers, booleans, null values, and keys
- Makes large JSON payloads easy to scan and read
Tree View
- Collapsible/expandable tree structure for navigating complex nested JSON
- Click any node to expand or collapse its children
JSON Path Display
- Hover over any value to see its full JSON path (e.g., $.data[0].name)
- Click to copy the path to your clipboard
Dark & Light Themes
- Beautiful dark mode (default) and light mode
- Your preference is saved automatically
Customizable Indentation
- Choose between 2 spaces, 4 spaces, or tab indentation
- Settings persist across browser sessions
100% Local Processing
- All JSON formatting happens entirely in your browser
- No data is ever sent to any server
- No tracking, no analytics, no data collection whatsoever
PERFECT FOR:
- API developers inspecting REST/GraphQL responses
- QA engineers debugging API calls
- Data analysts reviewing JSON datasets
- Anyone who works with JSON regularly
Lightweight, fast, and privacy-focused. JSON Formatter Pro is the only JSON viewer you'll ever need.