JSON Formatter

JSON Formatter guide

The JSON Formatter turns compact, hard-to-read JSON into an indented structure you can inspect, copy and validate. It is useful when you receive an API response, webhook payload, configuration file or browser storage export and need to understand it quickly.

The formatter also minifies valid JSON when you need a smaller payload for an example, test fixture or request body. Syntax errors are reported immediately, so you can find missing commas, unquoted keys, extra braces and other common mistakes before pasting JSON into code or sending it to an API.

When to use it

• Checking API responses from fetch, cURL, Postman or browser developer tools.
• Cleaning up configuration snippets before adding them to documentation or support tickets.
• Minifying JSON for compact test payloads, embeds or local storage values.
• Quickly confirming whether a pasted object is valid JSON rather than JavaScript object syntax.

How to use it

1. Paste your JSON into the input box.
2. Choose Pretty print to format it, Minify to remove whitespace, or Validate to only check syntax.
3. Use the indent selector if your project prefers two spaces, four spaces or tabs.
4. Expand or collapse nested objects and arrays when you only need a high-level view.
5. Copy the output once the status message confirms the JSON is valid.

Example

{"name":"UtilityTools","features":["format","minify","validate"],"private":true}

{
  "name": "UtilityTools",
  "features": [
    "format",
    "minify",
    "validate"
  ],
  "private": true
}

Privacy

Formatting and validation happen with JavaScript in your browser. The JSON you paste is not uploaded to UtilityTools.eu, and there is no account or database storing your content.

Limitations and accuracy notes

• This tool validates JSON syntax only; it does not validate against a JSON Schema.
• Very large files are limited by your browser memory and device performance.
• Comments and trailing commas are not valid JSON and will be reported as errors.

FAQ