JSON Formatter & Beautifier

Paste raw or minified JSON and instantly get clean, readable, syntax-highlighted output. Runs entirely in your browser — nothing is sent to a server.

Indent: 2 spaces 4 spaces Tabs

Paste your JSON above and click Format JSON to see the result.

About the JSON Formatter

This free online JSON formatter (also called a JSON beautifier or JSON pretty printer) takes raw or minified JSON and reformats it with consistent indentation and line breaks, making it easy to read and debug.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, human-readable data interchange format widely used in REST APIs, configuration files, and web applications. Because JSON is often minified to save bandwidth, a formatter is an essential tool for any developer working with APIs or data pipelines.

Features

Syntax highlighting for keys, strings, numbers, booleans, and null
Choose between 2-space, 4-space, or tab indentation
Minify JSON to a single compact line
Clear, pinpointed error messages for invalid JSON
Copy to clipboard or download as a .json file
100% client-side — your data never leaves your browser

How to use

Paste your JSON into the input box (or click Sample to load an example).
Select your preferred indentation style.
Click Format JSON to beautify, or Minify to compact.
Copy the result to your clipboard or download it as a file.

Common JSON errors

Trailing commas — JSON does not allow a comma after the last item in an array or object.
Single quotes — JSON requires double quotes for all strings and keys.
Unquoted keys — Unlike JavaScript objects, all JSON keys must be quoted.
Comments — Standard JSON does not support comments.