جے ایس او این فارمیٹر

How to use this tool

1. Paste your JSON. Drop raw JSON into the input box.
2. Choose an action. Beautify to read it, minify to ship it, or validate to find errors.
3. Fix any errors. The validator points to the exact position of the problem.
4. Copy the result. Use the copy button to grab the formatted output.

Free online JSON formatter, validator, beautifier and minifier

JSON is the language of modern APIs, configuration files and structured data. This free QW HOSTING tool formats, validates, beautifies and minifies JSON instantly — entirely inside your browser, so sensitive API payloads never touch a server.

Common JSON errors

• Trailing comma — {"a":1,} is invalid JSON even though JavaScript allows it.
• Single quotes — JSON strings and keys must use double quotes.
• Unquoted keys — {a:1} must be {"a":1}.
• NaN / Infinity / undefined — these are not valid JSON values.
• Unescaped characters — literal newlines and tabs inside strings must be escaped.

Minify before you ship

Minified JSON is typically 20-40% smaller, which means faster API responses and better Core Web Vitals. Combine it with gzip or Brotli compression — enabled by default on every QW HOSTING LiteSpeed server.

Frequently asked questions

Is my JSON data uploaded to a server?

No. This formatter runs entirely in your browser using JavaScript. Your data never leaves your device.

What is the difference between beautify and minify?

Beautify adds indentation and line breaks so JSON is readable. Minify strips all whitespace to make the payload as small as possible for production.

Why does my JSON show an error?

The most common causes are trailing commas, single quotes instead of double quotes, unquoted keys and unescaped line breaks inside strings.

Is there a size limit?

The tool comfortably handles files of several megabytes; performance depends on your device.

Can I sort JSON keys?

Yes, enable the "sort keys" option to output keys alphabetically, which is useful for diffing configuration files.