JSON Formatter & Validator

Free Online JSON Formatter

Paste any JSON data and instantly format it with proper indentation, or minify it for production. The validator shows exact error positions with line numbers when your JSON is malformed.

Features

• Format with 2-space indentation
• Minify to single line (remove all whitespace)
• Validate with error position and line number
• Interactive tree view with collapsible nodes
• Color-coded syntax: keys, strings, numbers, booleans, null
• Input/output byte count with size comparison

When to Use a JSON Formatter

JSON formatters are essential when working with API responses, configuration files, package.json, or any structured data. Minified JSON saves bandwidth in production, while formatted JSON makes debugging and code review significantly easier.

Related Tools

Use our JavaScript Formatter for JS code, or the Schema Generator to create valid JSON-LD structured data for SEO.