JSON Formatter
Beautify, minify, and validate JSON instantly.
About This JSON Formatter
JSON (JavaScript Object Notation) is the standard data format for APIs, config files, and modern web apps — but raw, minified JSON is nearly impossible to read by eye. This free JSON formatter instantly beautifies messy JSON into clean, indented, readable structure, or compresses it down to a single minified line for production use.
Validation With Clear Errors
If your JSON has a syntax error — a missing comma, an unescaped quote, a trailing comma — this tool tells you exactly what went wrong and where, so you can fix it in seconds instead of hunting through hundreds of lines manually.
100% Private
Your JSON is parsed entirely in your browser using native JavaScript. Nothing is ever uploaded to a server, which makes this tool safe to use even with sensitive API responses or internal config data.