JSON Formatter Online

How to Use the JSON Formatter

Paste your raw or minified JSON into the input field and click Format / Beautify. The tool validates your JSON and displays it with proper indentation and syntax. Use Minify to compress it back to a single line.

Common Use Cases

• Debug API responses — paste the raw response body to read it clearly.

• Validate config files — catch syntax errors in package.json, tsconfig.json, etc.

• Prepare data — format JSON before storing in documentation or sharing with teammates.

API Example

Automate JSON formatting in your pipeline with the REST API (requires API key, $5/mo):

## curl
curl -X POST https://apitoolkit.pro/api/v1/format-json \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"John","age":30}'

## JavaScript
const res = await fetch('https://apitoolkit.pro/api/v1/format-json', {
  method: 'POST',
  headers: { 'X-Api-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' },
  body: JSON.stringify({ name: 'John', age: 30 })
});
const { result } = await res.json();
console.log(result); // Pretty-printed JSON string

Get API Key — $5/mo →

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