Utilities
JSON Formatter
Paste JSON to format it with consistent indentation, validate it for syntax errors, or minify it to a single line. Useful for developers working with APIs, config files and data interchange.
On the way
JSON Formatter is coming soon
Paste JSON to format it with consistent indentation, validate it for syntax errors, or minify it to a single line. Useful for developers working with APIs, config files and data interchange.
We're still building this one. We'd rather not ship it until it works reliably end-to-end — no fake progress bars, no pretend success screens.
Try these instead
Going deeper
Working with JSON
JSON is the de facto data interchange format of the modern web. APIs return it, config files use it, databases store it, message queues carry it. Working with JSON is a daily task for most developers — and most of that work involves either making it readable (formatting/beautifying) or making it small (minifying).
Formatting JSON means adding line breaks and indentation to make the structure visible. A minified JSON string of 10,000 characters is unreadable; the same JSON formatted with 2-space indentation makes the structure immediately clear — you can see at a glance which objects nest inside which, which arrays contain which items, where the data actually lives. For debugging API responses, formatting is the first step.
Minification goes the other direction: strip all optional whitespace, produce a single-line JSON string. This is the right format for transmitting JSON over a network — the smaller the payload, the faster the transfer. Most production APIs serve minified JSON; most developer tools format it for display. This tool handles both directions, plus validation that tells you exactly where syntax errors are when the JSON won't parse.
What you get
Features
Format/beautify JSON with consistent indentation
Minify JSON to a single line
Validate and report syntax errors with line numbers
Tree view for exploring large JSON
Step by step
How to use
- 1
Paste JSON into the text area.
- 2
Click Format, Minify or Validate.
- 3
Copy or download the result.
Your privacy
How this tool handles your file
JSON formatting happens entirely in your browser. No data leaves your device.
Read more about our security practices or see our privacy policy.
Frequently asked
Common questions
Keep going
Related tools
Tools that pair well with JSON Formatter.
Looking for something else? Browse all tools or ask us to build one.