JSON Formatter
Online JSON formatter, validator and compressor with syntax error highlighting
About JSON Formatter
JSON Formatter is one of the most essential tools for developers. API responses often return unformatted JSON that is hard to read. Simply paste your JSON string and it will be automatically beautified with proper indentation. Syntax errors are highlighted in real-time. One-click minify to compress JSON into a single line. All processing happens locally in your browser — your data never leaves your device. Ideal for frontend development, backend debugging, and data analysis.