Free Online JSON Formatter
What Is a JSON Formatter?
A JSON formatter (also called a JSON beautifier or JSON pretty printer) takes raw, unformatted JSON and applies consistent indentation and line breaks so that the data becomes readable at a glance. Machines parse compressed JSON easily, but humans need whitespace — indentation, line breaks, and visual structure — to understand nested objects and arrays.
Why Format JSON?
- Debug faster — spot missing brackets, misplaced commas, and structural issues the moment you see the layout.
- Read APIs clearly — paste a raw API response and get back well-structured data you can navigate by eye.
- Collaborate better — formatted JSON makes code reviews and team discussions clearer.
- Validate instantly — the formatter catches syntax errors as you type and points to the exact location of the problem.
How to Use the JSON Beautifier
- Copy your JSON data and paste it into the input area.
- Choose your preferred indentation — 2 spaces, 4 spaces, 8 spaces, or tab.
- Click Format to beautify or Minify to compress into a single line.
- Toggle key sorting or line numbers to suit your needs.
- Click Copy to copy the formatted result to your clipboard.
Features at a Glance
- Customizable indent — switch between 2/4/8 spaces or tab indentation.
- Key sorting — sort object keys alphabetically for consistent output.
- Line numbers — toggle line numbers for easier reference.
- Statistics — view character count, line count, and JSON depth.
- Example data — load sample JSON to see how the formatter works.
FAQ
1. What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It represents structured data as key-value pairs and ordered lists.
2. Is this JSON formatter free to use?
Yes, it is completely free with no usage limits, no registration, and no hidden fees. Use it as often as you need.
3. Does the formatter check for errors?
Yes. The formatter parses your input and if the JSON is invalid, it shows the exact position of the syntax error so you can fix it quickly.
4. What is the difference between Format and Minify?
Format (also called beautify or pretty-print) adds indentation and line breaks to make JSON readable. Minify removes all whitespace to produce the smallest possible payload, which is useful for saving bandwidth in production.
5. Is my data sent to a server?
No. All processing happens entirely in your browser. Your JSON data never leaves your device. You can use the tool with sensitive data securely.
6. Can I sort the keys in my JSON?
Yes. Enable the Sort Keys option before formatting. The output will have all object keys sorted alphabetically, which helps to produce consistent and comparable output across different runs.
7. What does the Depth statistic tell me?
The depth shows how many levels of nesting your JSON has. A flat object with no nested properties has depth 1. An object containing arrays or objects within itself has a higher depth. This helps you assess the complexity of your data structure.
How to Use
- Paste or type your JSON data into the input area on the left.
- Click the Format button to beautify your JSON or Minify to compress it.
- Adjust indentation, enable key sorting, or toggle line numbers using the controls above.
- Use the Copy button to copy the result to your clipboard.