What is JSON formatting?

JSON formatting (or beautifying) adds indentation and line breaks to compact JSON, making it human-readable. Minifying does the reverse — removing all whitespace to reduce file size.

How do I validate JSON?

Paste your JSON into the editor above. The tool will instantly tell you if your JSON is valid or show the exact line and character position of any errors.

What is the difference between JSON format and minify?

Formatting adds whitespace and indentation for readability. Minifying removes all unnecessary whitespace to produce the smallest possible JSON string for use in APIs or storage.

Is my JSON data sent to a server?

No. All formatting and validation happens entirely in your browser using JavaScript. Your data is never transmitted anywhere.

What causes invalid JSON?

Common causes include trailing commas, single quotes instead of double quotes, unquoted keys, missing colons, and unclosed brackets or braces.

Free JSON Formatter & Validator Online

Beautify, minify, and validate JSON with live syntax highlighting, an error panel with line numbers, and a collapsible tree view. Everything runs in your browser.

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Frequently Asked Questions

What is JSON formatting?: JSON formatting (or beautifying) adds indentation and line breaks to compact JSON, making it human-readable. Minifying does the reverse — removing all whitespace to reduce file size.
How do I validate JSON?: Paste your JSON into the editor above. The tool will instantly tell you if your JSON is valid or show the exact line and character position of any errors.
What is the difference between JSON format and minify?: Formatting adds whitespace and indentation for readability. Minifying removes all unnecessary whitespace to produce the smallest possible JSON string for use in APIs or storage.
Is my JSON data sent to a server?: No. All formatting and validation happens entirely in your browser using JavaScript. Your data is never transmitted anywhere.
What causes invalid JSON?: Common causes include trailing commas, single quotes instead of double quotes, unquoted keys, missing colons, and unclosed brackets or braces.