JSON Formatter & Validator
Format, validate, and inspect JSON with code, tree, table, YAML, type, path, and stats views.
Input Composer
Paste raw JSON or upload a file
Output Workspace
Your formatted result will appear here
Ready for formatted output
Paste raw JSON into the editor and use the primary Format action. Once formatted, this workspace becomes a multi-view inspector for debugging, analysis and export.
Code + Tree
Read raw structure and collapse nested nodes.
Table + Types
Turn arrays into rows and infer TypeScript interfaces.
Paths + YAML + Stats
Extract paths, convert formats and inspect structure metrics.
Free Online JSON Formatter & Validator
Format, validate, and explore JSON in 7 powerful views — syntax-highlighted code, tree explorer, table, TypeScript types, JSONPath list, YAML converter and stats. All in your browser, instantly.
How It Works
Paste or Upload
Drop your JSON into the editor or drag-and-drop a .json file directly.
Set Options
Choose indent size (2 / 3 / 4 spaces), sort keys, or minify output.
Format & Explore
Hit Format and instantly switch between 7 powerful output views.
Key Features
Real-Time Validation
Instantly validates JSON syntax as you type — errors surface before you click Format.
Syntax Highlighting
Color-coded keys, strings, numbers, and booleans matching professional IDE themes.
Interactive Tree View
Collapse and expand nested objects and arrays to navigate complex structures easily.
Table View
Auto-converts arrays of objects into a sortable, type-aware data table.
TypeScript Interfaces
Generates TypeScript interface definitions directly from your JSON structure.
Secure & Private
All processing runs in your browser — your data never leaves your machine.
Export Anywhere
Download formatted JSON, YAML, or TypeScript interfaces as files with one click.
7 Output Views
Switch between Code, Tree, Table, Types, Paths, YAML, and Stats — all from one input.
Frequently Asked Questions
What is a JSON Formatter?
A JSON Formatter takes minified or messy JSON and restructures it with proper indentation and whitespace, making it easy to read and debug.
Is this tool safe to use?
Yes. All processing happens entirely in your browser via JavaScript. No data is sent to any server — your JSON stays on your machine.
How does real-time validation work?
As you type, the tool silently parses your input. A green badge appears when it's valid JSON; a red badge with an error message appears the moment a syntax error is detected.
What are the 7 output views?
Code (syntax-highlighted), Tree (collapsible explorer), Table (for arrays of objects), Types (TypeScript interfaces), Paths (JSONPath expressions), YAML (converted output), and Stats (key counts, depth, type breakdown).
Can I convert JSON to YAML?
Yes — format your JSON first, then click the YAML tab. The converted YAML is shown with syntax highlighting and can be copied or downloaded as a .yml file.
Can I sort JSON keys alphabetically?
Yes. Enable the Sort Keys option before formatting and all object keys will be recursively sorted in alphabetical order.