Breezy Tools

JSON Formatter

Format, validate, and beautify JSON with customizable indentation.

How to Use JSON Formatter

  1. 1

    Paste your JSON

    Paste or type raw JSON into the input area. The tool accepts any valid JSON — objects, arrays, nested structures, and more.

  2. 2

    Choose your indentation

    Select 2 spaces, 4 spaces, or tabs depending on your project's style guide or personal preference.

  3. 3

    View formatted output

    The formatted JSON appears instantly in the output panel. Syntax errors are highlighted in real time so you can fix them quickly.

  4. 4

    Copy or minify

    Click Copy to grab the formatted result, or switch to Minify mode to compress the JSON for production use.

Key Features

Real-Time Formatting

JSON is formatted instantly as you type — no need to click a button or wait for processing.

Customizable Indentation

Choose between 2 spaces, 4 spaces, or tab characters to match your team's code style.

Syntax Error Detection

Invalid JSON is flagged immediately with clear error messages, helping you locate and fix issues fast.

One-Click Minify

Compress formatted JSON into a single line for APIs, config files, or anywhere compact JSON is needed.

One-Click Copy

Copy the entire output to your clipboard with a single click — no manual selecting required.

Common Use Cases

  • Debugging API Responses

    Paste a raw JSON response from an API to quickly see its structure and spot unexpected values or missing fields.

  • Cleaning Up Config Files

    Beautify messy JSON configuration files before committing them to version control for better readability.

  • Validating JSON Payloads

    Verify that a JSON string is syntactically correct before sending it to an endpoint or saving it to a database.

Frequently Asked Questions

Is my JSON data sent to a server?▾

No. All formatting and validation happens entirely in your browser using JavaScript. Your data never leaves your device.

What is the maximum JSON size I can format?▾

There is no hard limit. The tool runs in your browser, so performance depends on your device. Most JSON files up to several megabytes format instantly.

Can I format JSON with comments?▾

Standard JSON does not support comments. If your input contains comments, they will be flagged as syntax errors. Consider using JSONC or JSON5 for commented configurations.

What is the difference between formatting and minifying?▾

Formatting adds whitespace and indentation for readability. Minifying removes all unnecessary whitespace to reduce file size — useful for production payloads and config files.