JSON Formatter
Beautify or minify JSON instantly. Format messy JSON into readable, indented output.
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Learn more about the JSON Formatter
What Does This JSON Formatter Do?
This tool beautifies or minifies JSON. Paste minified or messy JSON — an API response, a config file, a log line — or drag and drop a .json file, and it's instantly reformatted with 2 or 4-space indentation and syntax highlighting.
Switch to Tree View to explore nested objects and arrays as a collapsible structure instead of scrolling through raw text, or use Minify to strip whitespace down to the smallest possible payload before shipping. Since only valid JSON can be reformatted, invalid input is flagged with a precise error instead of failing silently.
Everything runs locally in your browser; your JSON is never uploaded to a server.
Why Format JSON?
Readability
Nested objects and arrays are hard to scan when JSON is minified onto a single line. Proper indentation makes structure and relationships between fields obvious at a glance.
Debugging
A formatted view makes it easy to spot missing commas, mismatched brackets, or an unexpected data type without hunting through a wall of unbroken text.
API Development
When inspecting request and response payloads from an API, formatted JSON lets you quickly verify field names, types, and nesting while building or testing endpoints.
Logging
Structured logs are usually shipped minified to save space. Formatting a log entry before reviewing it makes it far easier for a human to trace what happened.
Example
Here's the same JSON object before and after formatting with 2-space indentation.
{"name":"John Doe","age":30,"isDeveloper":true,"skills":["JavaScript","TypeScript","React"],"address":{"street":"123 Main St","city":"New York","zip":"10001"},"projects":[{"name":"PayloadTools","stars":1200},{"name":"JSONFormatter","stars":850}],"active":true}{
"name": "John Doe",
"age": 30,
"isDeveloper": true,
"skills": [
"JavaScript",
"TypeScript",
"React"
],
"address": {
"street": "123 Main St",
"city": "New York",
"zip": "10001"
},
"projects": [
{
"name": "PayloadTools",
"stars": 1200
},
{
"name": "JSONFormatter",
"stars": 850
}
],
"active": true
}Features
Format
Beautify minified or messy JSON into clean, indented output with 2 or 4-space indentation.
Minify
Strip all whitespace to produce the smallest possible JSON payload for production use.
Upload a File
Drag and drop or upload a .json file to format it directly, no copy-pasting required.
Copy
Copy the formatted or minified output to your clipboard with a single click.
Download
Save the result as a standalone .json file for use in your project or documentation.
How to use
Paste your input in the left editor. The output appears automatically on the right. Use the toolbar buttons to copy, download, or transform the result.
- Paste or type your content in the input editor on the left.
- The formatted output is generated automatically.
- Use Copy, Download, or other actions from the output toolbar.
- Click the expand icon to view the output in fullscreen.
FAQ
Is this JSON formatter free?
Yes, the JSON formatter is completely free to use with no limits, signup, or account required.
Is my JSON uploaded to a server?
No. All formatting happens locally in your browser using JavaScript, whether you paste JSON or upload a file. Your JSON is never uploaded or sent to a server.
Can I format a JSON file instead of pasting JSON?
Yes. Drag and drop a .json file onto the input panel, or click the upload icon in the panel header to browse for one. Files up to 5MB are supported.
Can I format large JSON files?
Yes, the formatter handles large JSON documents smoothly since everything runs client-side in the Monaco editor, the same editor used in VS Code.
What is the difference between formatting and minifying JSON?
Formatting (beautifying) adds indentation and line breaks so JSON is easy to read. Minifying strips all unnecessary whitespace to produce the smallest possible file size, useful for production APIs.
Does this tool validate JSON syntax too?
Yes. If your JSON has a syntax error, the tool shows an "Invalid JSON" status with a description of the error so you can fix it quickly.
Can I view JSON as a collapsible tree instead of raw text?
Yes, switch to Tree View to explore nested objects and arrays interactively instead of scrolling through raw text.
What indentation options are available?
You can choose between 2-space and 4-space indentation for the formatted output.
Does formatting change my data or key order?
No. Formatting only changes whitespace and line breaks for readability — it never alters values, data types, or the order of keys.