JSON Formatter

How to use the JSON Formatter

1. Paste your JSON into the JSON Input box.
2. Pick an indentation — 2 spaces, 4 spaces or tabs.
3. Press Format JSON to pretty-print it, Minify JSON to compress it, or Validate JSON to just check it.
4. Use Copy JSON or Download JSON to save the result. Clear resets everything.

What is JSON?

JSON (JavaScript Object Notation) is a simple, text-based format for storing and exchanging data. It uses objects written with curly braces, arrays written with square brackets, and a small set of value types: strings, numbers, booleans (true/false), null, and nested objects and arrays. Because it is easy for both people and machines to read, JSON is used everywhere — in web APIs, configuration files, databases and app settings.

What is a JSON Formatter?

A JSON formatter takes JSON text and re-writes the whitespace so it is easy to work with, without changing any of the data. This tool does three jobs: it formats (beautifies / pretty-prints) JSON with neat indentation, it minifies JSON by stripping all unnecessary spaces and line breaks, and it validates JSON by checking that it parses correctly. Everything happens in your browser using the built-in JSON parser, so your data never leaves your device.

How to format JSON

Paste your JSON and press Format JSON. The tool parses the text and re-serialises it with your chosen indentation, turning a single dense line into a clean, indented structure that is easy to scan. Formatting is ideal when you have copied minified JSON from an API response or a log and want to read it.

How to validate JSON

Press Validate JSON to check your text without changing it. If the JSON is valid you will see a “Valid JSON ✓” message; if not, you get a clear error, and where the browser reports a reliable position, the approximate line and column of the problem. Your input is left untouched so you can fix it and try again.

How to minify JSON

Press Minify JSON to remove every unnecessary space and line break. Minified JSON is smaller, which is useful for sending data over a network, embedding it in code, or saving storage — and it still contains exactly the same values as the formatted version.

JSON formatting examples

• Minified {"name":"ToolsRisePro","tools":13,"active":true}
• Formatted (2 spaces) — the same data across multiple indented lines, one key per line.
• Nested {"user":{"id":1,"roles":["admin","editor"]}} formats each level with its own indentation.

Common JSON errors

• Trailing comma — a comma after the last item, e.g. [1, 2, 3,]. JSON does not allow it.
• Missing comma — two values or pairs with no comma between them.
• Single quotes — JSON strings and keys must use double quotes, not 'single' quotes.
• Unquoted keys — every object key must be a quoted string.
• Mismatched brackets — an opening { or [ without a matching close.

Features

• Format, minify and validate in one place.
• Indentation control — 2 spaces, 4 spaces or tabs.
• Copy & download the result as a .json file.
• Helpful errors with approximate line and column where available.
• Statistics — character count, line count and top-level type.

Benefits

Readable JSON is easier to debug, review and share. Formatting reveals the structure of an API response at a glance; validating catches a stray comma or missing quote before it breaks your code; and minifying trims the size for production. Because it all runs locally, you can safely work with private or sensitive data without uploading it anywhere.

Is it private?

Yes. The JSON Formatter runs entirely in your web browser using JavaScript and the native JSON parser. The JSON you enter is never sent to a server, never stored, and never shared. There is no sign-up and no tracking, and your JSON is treated only as data — never run as code.