What JSON features are supported?

Format, validate, beautify, minify, sort keys alphabetically, tree view navigation, trim strings, and remove null values.

Does it handle large JSON files?

Yes. All processing happens in your browser using native JSON parsing, which handles multi-megabyte files efficiently.

Yes. Your JSON never leaves your browser. All formatting and validation happens locally with zero server requests.

JSON Formatter & Validator Online

Input

Trim string values

Remove leading/trailing whitespace

Remove null values

Strip null from output

JSON Formatter & Validator Online

Format, validate, and explore JSON data instantly in your browser. Paste raw or minified JSON and get properly indented, readable output with full validation and error reporting.

Format & beautify: Pretty-print JSON with 2 spaces, 4 spaces, or tab indentation
Validate: Instant validation with clear error messages showing line and column numbers
Minify: Compress JSON by removing all whitespace for APIs and storage
Tree view: Explore JSON as a collapsible hierarchy with type-colored values
Sort keys: Alphabetically sort object keys at every nesting level
File upload: Drag and drop .json files directly onto the input

Working with CSV data? Use our CSV to JSON converter. Need to move JSON into a spreadsheet? Try JSON to Sheets.

How to format JSON

Formatting JSON takes just a few seconds:

Paste your JSON data or drag and drop a .json file onto the input area
The formatted output appears instantly in the Formatted tab
Switch indentation style (2 spaces, 4 spaces, tab, minified) using the toolbar
Toggle A-Z in the toolbar to sort keys alphabetically
Use the Tree View tab to explore nested structures visually
Copy or download the result

If your JSON is invalid, the tool shows a clear error message with the line and column where the problem was found. Fix the issue and the output updates in real time.

Why use our JSON Formatter?

A clean, fast JSON tool without the clutter.

Easy - Sometimes you just need a simple tool with no fuss. Our JSON Formatter is just that. But for those times when you need more, it also has powerful features such as tree view, sort keys, validation with line numbers and file upload.
Fast - Our JSON Formatter is fast. Start now and instantly get formatted JSON. Results update in real-time as you type or change settings.
Modern - Our JSON Formatter is built in Next 16, with Material 3 design and served on blazingly fast Vercel edge servers.
Ad free - Our JSON Formatter is free from ads. Many other tools are cluttered with ads, but not this one.
Free for life - Our JSON Formatter is free to use forever.

Frequently Asked Questions

Common questions about formatting and validating JSON.

What is a JSON formatter?

A JSON formatter takes raw or minified JSON data and reformats it with proper indentation and line breaks, making it readable. It can also validate the JSON structure and report syntax errors with their location.

How do I validate JSON online?

Paste your JSON into the input area. If it is valid, the formatted output appears immediately. If it is invalid, the tool shows an error message with the line and column number where the problem was found.

What is the difference between formatting and minifying JSON?

Formatting (beautifying) adds indentation and line breaks to make JSON readable. Minifying removes all unnecessary whitespace to produce the smallest possible output, which is ideal for APIs and storage.

Can I sort JSON keys alphabetically?

Yes. Toggle the A-Z button in the toolbar to sort all object keys alphabetically at every nesting level. This is useful when comparing two JSON files or enforcing a consistent key order.

Is this JSON formatter free?

Yes, completely free with no signup required. All processing happens locally in your browser, so your JSON data never leaves your device.

What is the JSON tree view?

The tree view displays your JSON as a collapsible hierarchy. Each key and value is shown as a node you can expand or collapse, making it easy to navigate large, deeply nested structures without scrolling through raw text.

How to format JSON online

Step-by-step guide to formatting and validating JSON.

Open the JSON Formatter at limeconvert.com/json-formatter
Paste your JSON data or drag and drop a .json file
The formatted output appears instantly in the Formatted tab
Switch indentation (2 spaces, 4 spaces, tab) using the toolbar
Copy or download the formatted JSON

How to minify JSON online

Compress JSON by removing all whitespace.

Open the JSON Formatter
Paste or upload your JSON data
Click the Minified tab to see the compact output
Copy or download the minified JSON

Input

Trim string values

Remove leading/trailing whitespace

Remove null values

Strip null from output

JSON Formatter & Validator Online

Format, validate, and explore JSON data instantly in your browser. Paste raw or minified JSON and get properly indented, readable output with full validation and error reporting.

Format & beautify: Pretty-print JSON with 2 spaces, 4 spaces, or tab indentation
Validate: Instant validation with clear error messages showing line and column numbers
Minify: Compress JSON by removing all whitespace for APIs and storage
Tree view: Explore JSON as a collapsible hierarchy with type-colored values
Sort keys: Alphabetically sort object keys at every nesting level
File upload: Drag and drop .json files directly onto the input

Working with CSV data? Use our CSV to JSON converter. Need to move JSON into a spreadsheet? Try JSON to Sheets.

How to format JSON

Formatting JSON takes just a few seconds:

Paste your JSON data or drag and drop a .json file onto the input area
The formatted output appears instantly in the Formatted tab
Switch indentation style (2 spaces, 4 spaces, tab, minified) using the toolbar
Toggle A-Z in the toolbar to sort keys alphabetically
Use the Tree View tab to explore nested structures visually
Copy or download the result

If your JSON is invalid, the tool shows a clear error message with the line and column where the problem was found. Fix the issue and the output updates in real time.

Why use our JSON Formatter?

A clean, fast JSON tool without the clutter.

Easy - Sometimes you just need a simple tool with no fuss. Our JSON Formatter is just that. But for those times when you need more, it also has powerful features such as tree view, sort keys, validation with line numbers and file upload.
Fast - Our JSON Formatter is fast. Start now and instantly get formatted JSON. Results update in real-time as you type or change settings.
Modern - Our JSON Formatter is built in Next 16, with Material 3 design and served on blazingly fast Vercel edge servers.
Ad free - Our JSON Formatter is free from ads. Many other tools are cluttered with ads, but not this one.
Free for life - Our JSON Formatter is free to use forever.

Frequently Asked Questions

Common questions about formatting and validating JSON.

What is a JSON formatter?

How do I validate JSON online?

What is the difference between formatting and minifying JSON?

Can I sort JSON keys alphabetically?

Yes. Toggle the A-Z button in the toolbar to sort all object keys alphabetically at every nesting level. This is useful when comparing two JSON files or enforcing a consistent key order.

Is this JSON formatter free?

Yes, completely free with no signup required. All processing happens locally in your browser, so your JSON data never leaves your device.

What is the JSON tree view?

How to format JSON online

Step-by-step guide to formatting and validating JSON.

Open the JSON Formatter at limeconvert.com/json-formatter
Paste your JSON data or drag and drop a .json file
The formatted output appears instantly in the Formatted tab
Switch indentation (2 spaces, 4 spaces, tab) using the toolbar
Copy or download the formatted JSON

How to minify JSON online

Compress JSON by removing all whitespace.

Open the JSON Formatter
Paste or upload your JSON data
Click the Minified tab to see the compact output
Copy or download the minified JSON

Input

Options

JSON Formatter & Validator Online

How to format JSON

Why use our JSON Formatter?

Frequently Asked Questions

What is a JSON formatter?

How do I validate JSON online?

What is the difference between formatting and minifying JSON?

Can I sort JSON keys alphabetically?

Is this JSON formatter free?

What is the JSON tree view?

How to format JSON online

How to minify JSON online

We are Lime Convert

Input

Options

JSON Formatter & Validator Online

How to format JSON

Why use our JSON Formatter?

Frequently Asked Questions

What is a JSON formatter?

How do I validate JSON online?

What is the difference between formatting and minifying JSON?

Can I sort JSON keys alphabetically?

Is this JSON formatter free?

What is the JSON tree view?

How to format JSON online

How to minify JSON online