JSON-parser.net — Online JSON Formatter, Validator & Tools

Free online JSON parser and formatter. Format, minify, validate JSON. Convert JSON to YAML. Compare JSON files with diff tool. Fast, secure, and private.

How to Use the JSON Tools

This modern JSON toolkit provides everything you need for JSON/YAML processing in your browser. Built with Monaco Editor (the same engine powering VS Code) and powered by Web Workers for smooth performance.

🚀 Quick Start

  1. Paste or drag-drop your JSON/YAML into the left editor
  2. Use the toolbar buttons to format, minify, or validate
  3. View results in the right panel tabs
  4. Copy results or download as files
  5. Try Ctrl+K for command palette

⌨️ Keyboard Shortcuts

Format JSON Ctrl+Shift+F
Minify JSON Ctrl+Shift+M
Validate Ctrl+Shift+V
Command Palette Ctrl+K

Advanced Features

🔍 JSONPath Explorer

Find and extract data using JSONPath expressions. Click paths to copy them instantly.

📋 Schema Generator

Auto-generate JSON Schema (draft-2020-12) from your data with customizable options.

🔄 Smart Diff

Compare JSON objects with visual diff highlighting and patch generation.

Common Use Cases

  • • API Development: Format and validate API responses
  • • Configuration Management: Validate config files against schemas
  • • Data Analysis: Extract specific values using JSONPath
  • • DevOps: Convert between JSON and YAML for different tools
  • • Debugging: Compare different versions of data structures
  • • Documentation: Generate schemas from example data

Validation & Schemas (draft-2020-12)

Our validator uses AJV with full draft-2020-12 support including formats, conditionals, and references. For complex schemas or large datasets, operations are automatically moved to Web Workers to maintain UI responsiveness. The schema generator can create comprehensive schemas with examples, format hints, and required field detection.

🔒 Privacy & Performance

All processing happens locally in your browser. No data is sent to servers. Large operations use Web Workers and optional WebAssembly for optimal performance.

Help shape this tool

We’re building this for you. Tell us what you want, what you like, and what you don’t — and we’ll keep making it better.