JSON Formatter & Validator
Advanced JSON formatter with validation, beautification, minification, schema validation, and conversion to CSV, SQL, YAML. Analyze JSON structure and detect errors instantly.
Input JSON
Output
Quick Examples
About JSON Formatter & Validator
Our JSON Formatter & Validator is a comprehensive, free online tool designed for developers, data analysts, and API engineers who work with JSON data daily. This powerful tool goes beyond simple formatting – it validates JSON syntax, detects errors with precise line and column numbers, converts JSON to multiple formats (CSV, SQL, YAML), validates against JSON schemas, and provides detailed analysis of your data structure. Whether you're debugging API responses, cleaning up configuration files, converting data formats, or validating complex JSON structures, our formatter handles it all client-side with instant results. No uploads, no server processing, complete privacy. With support for large files (up to 50MB), syntax highlighting, collapsible tree views, and one-click operations, it's the most feature-rich JSON tool available online.
How to Use JSON Formatter & Validator
- Paste or type your JSON data into the input editor
- The tool automatically validates syntax and highlights any errors
- Click 'Format' to pretty-print with proper indentation (2 or 4 spaces)
- Click 'Minify' to remove all whitespace for compact output
- Use 'Sort Keys' to alphabetically organize all JSON keys
- Select conversion format (CSV, SQL, YAML) and click 'Convert'
- For schema validation, paste your JSON Schema and click 'Validate Schema'
- View analysis stats (object count, array count, data types) in the sidebar
- Click 'Copy' to copy formatted JSON to clipboard or 'Download' to save as file
Key Features
- ✓Real-time JSON syntax validation with error highlighting
- ✓Pretty-print formatting with configurable indentation
- ✓Minify JSON to remove unnecessary whitespace
- ✓Sort keys alphabetically (recursively)
- ✓Syntax highlighting with color-coded keys, values, and types
- ✓Convert JSON to CSV, SQL INSERT statements, or YAML
- ✓Convert CSV back to JSON format
- ✓JSON Schema validation with detailed error messages
- ✓Detect duplicate keys and trailing commas
- ✓JSON analysis: count objects, arrays, and data types
- ✓Collapsible tree view for nested structures
- ✓JSON diff: compare two JSON objects
- ✓Copy to clipboard with one click
- ✓Download formatted/converted output
- ✓Support for large files (up to 50MB)
- ✓History of last 5 JSON inputs (localStorage)
- ✓100% client-side processing for privacy
Common Use Cases
Validating and debugging API responses from REST endpoints
Formatting messy JSON configuration files
Converting JSON data to CSV for Excel analysis
Generating SQL INSERT statements from JSON arrays
Validating JSON against OpenAPI, GeoJSON, or custom schemas
Analyzing complex nested JSON structures
Comparing two JSON objects to find differences
Cleaning up and beautifying JSON before committing to Git
Related Developer Tools
Database Schema Architect
Design and export SQL schemas.
REST API Mocker
Create mock endpoints instantly.
Explore more developer tools and resources on Developer Hub.
Community Q&A
Join the conversation! This community feature is coming soon to all Developers.
Recommended
About Backend
Part of the Backend suite. Optimized for professional workflows.