JSON Validator & Auto-Fix Tool - Detect & Repair JSON Syntax Errors Automatically
Advanced JSON validator and auto-repair tool that detects syntax errors, missing commas, bracket mismatches, and invalid formatting. Automatically fix common JSON issues and validate against JSON Schema with detailed error reporting.
Advanced JSON Validation Features
- •Real-time syntax error detection with precise line numbers
- •Comprehensive JSON Schema validation support
- •Missing comma and bracket detection with auto-fix suggestions
- •Invalid string quotation and escaping error identification
- •Data type validation and format checking
- •Duplicate key detection and resolution
- •Value validation against expected data types
- •Structural integrity analysis for complex nested JSON
Intelligent Auto-Fix Capabilities
- •Automatic comma insertion for missing separators
- •Smart bracket and brace matching with auto-completion
- •Quote correction for unescaped strings and keys
- •Trailing comma removal for JSON compliance
- •Invalid character detection and replacement
- •Boolean and null value correction
- •Number format validation and standardization
- •Unicode escape sequence handling and conversion
Professional Validation Tools
- •JSON Schema compliance checking with detailed reports
- •Custom validation rules for business logic verification
- •API response validation for endpoint testing
- •Configuration file validation for deployment safety
- •Data migration validation for database imports
- •Multi-format validation (JSON, JSON5, JSONC support)
- •Large file validation up to 10MB with performance optimization
- •Batch validation for multiple JSON files simultaneously
Error Analysis & Reporting
- •Detailed error reports with context and suggestions
- •Visual error highlighting with color-coded indicators
- •Error severity classification (critical, warning, info)
- •Fix confidence scoring for auto-repair suggestions
- •Validation history tracking for quality assurance
- •Export validation reports for documentation and auditing
- •Integration APIs for automated validation workflows
- •Team collaboration features for error resolution
Complete JSON Validation & Fixing Guide
- Step 1: Paste your potentially invalid JSON into the validator or upload a JSON file
- Step 2: Review the automatic error detection with highlighted syntax issues
- Step 3: Examine detailed error messages showing exact line and column locations
- Step 4: Use the 'Auto-Fix' feature to automatically repair common JSON errors
- Step 5: Review suggested fixes and accept or modify them based on your needs
- Step 6: Validate the corrected JSON against JSON Schema if you have specific requirements
- Step 7: Test the fixed JSON in your application to ensure it works as expected
- Step 8: Download the corrected JSON or copy it for use in your projects
- Step 9: Save validation reports for documentation and quality assurance purposes
Feature Comparison
| Feature | Online JSON Formatt | Other Tools |
|---|---|---|
| Auto-fix capabilities | Intelligent repair | Manual fixing only |
| Error precision | Line & column accuracy | General error messages |
| Schema validation | Full JSON Schema support | Syntax validation only |
| Fix confidence scoring | Reliability indicators | No confidence metrics |
| Batch validation | Multiple files | Single file only |
| Large file support | Up to 10MB | 1-2MB limit |
| Validation reports | Exportable reports | No reporting |
| Fix suggestions | Context-aware suggestions | Basic error detection |
| JSON variants | JSON, JSON5, JSONC | JSON only |
| API integration | Automation ready | Manual use only |