JSON Formatter Online
100% Client-SideFormat JSON online with customizable indentation, auto-repair syntax errors, and live statistics. 100% client-side processing ensures your data never leaves your browser.
Key Capabilities
Frequently Asked Questions
What does a JSON formatter do?
A JSON formatter reformats JSON data with consistent indentation, line breaks, and spacing to make it more readable and easier to debug.
Can I format invalid JSON?
Yes, the JSON Formatter includes an auto-repair feature that can fix common syntax mistakes like single quotes, trailing commas, and unquoted object keys before formatting. If your JSON has errors, try enabling auto-repair or check the error message for details.
What is the difference between JSON formatting and minifying?
Formatting adds whitespace and indentation to make JSON human-readable, while minifying removes all unnecessary whitespace to reduce file size for transmission.
How do I format JSON online?
Paste your JSON into the input editor and click **Format JSON**. Choose your preferred indentation, such as 2 spaces, 4 spaces, 8 spaces, or tabs. The formatter organizes the data with consistent spacing and line breaks to make it easier to read.
Is this JSON formatter free to use?
Yes. You can format JSON using this free online tool without creating an account or subscribing to a plan.
Is it safe to format sensitive JSON data online?
This formatter processes JSON directly in your browser, so your data does not need to be uploaded to a server. Avoid entering sensitive information into any online tool unless you have verified how its code and dependencies handle your data.
What is the difference between a JSON formatter and a JSON validator?
A JSON formatter improves the readability of JSON by adding indentation and line breaks. A JSON validator checks whether the input follows JSON syntax rules and reports errors when it does not. Some tools, including this formatter, offer both formatting and syntax-related features.
Why is my JSON not formatting correctly?
Your input may contain syntax errors such as missing commas, unmatched braces, or incorrectly quoted strings. Check the error message and review the input. If supported, enable auto-repair to attempt to fix common issues before formatting the result.
Can I format large JSON files?
You can try formatting large JSON inputs, but performance depends on your device, browser memory, and the size and complexity of the data. Very large files may take longer to process or may exceed available browser resources.
Does formatting JSON change its data?
Formatting should preserve the underlying JSON values while changing whitespace and indentation. If you use auto-repair, however, the tool may modify invalid syntax to produce valid JSON. Review repaired output before relying on it.