JSON

JSON Formatter

Format messy JSON into clean, readable indentation.

Tool guide

How to use JSON Formatter

JSON Formatter gives you a focused way to handle one small task quickly. Format messy JSON into clean, readable indentation. It is free to use, requires no login, and is built for quick checks when you need a practical result.

Useful for

Format minified API responses so objects and arrays are easier to inspect.
Clean JSON examples before pasting them into documentation, tickets, or test fixtures.
Spot missing brackets, wrong nesting, and suspicious data types while debugging.

Example

For example, paste a compact API response into the JSON formatter before checking user IDs, timestamps, nested arrays, or configuration values.

Good to know

Most developer utilities run in your browser. Avoid pasting secrets, API keys, passwords, or private production data into any online tool.

How it works

The JSON formatter parses JSON text and reprints it with clean indentation. It helps make API responses, configuration files, and structured data easier to inspect.

Valid JSON is parsed into an object, then serialized again with indentation.

Practical examples

Format a minified API response before reading it.
Clean a config snippet before sending it to a teammate.
Spot nested objects and arrays more easily.

Common mistakes

JSON requires double quotes around property names and string values.
Trailing commas are not valid JSON.

Questions

Does formatting change the data?

No. Formatting changes spacing and line breaks, not the parsed values.

Why does my JSON fail?

Common causes are missing quotes, trailing commas, or unescaped characters.