JSON Formatter
Format, validate, and minify JSON data directly in your browser. This tool is useful when you need to inspect API responses, clean configuration files, check copied payloads, or reduce JSON into a compact single-line string.
JSON formatter tool
How to use this JSON formatter
Paste a JSON object, array, string, number, boolean, or null value into the input box. Select Format to convert valid JSON into an indented structure, Minify to remove extra whitespace, or Validate to check whether the input can be parsed as JSON.
If the input contains a syntax problem, the tool shows the parsing error instead of changing the output. Common issues include missing commas, trailing commas, single quotes around strings, unescaped line breaks, and comments copied from JavaScript files.
Example
A compact value such as {"name":"demo","enabled":true} can be formatted into a readable multi-line block. The same input can also be minified again for use in a request body, environment variable, or log field.
Frequently asked questions
What is JSON formatting?
JSON formatting adds indentation and line breaks to valid JSON so nested objects and arrays are easier to read.
What is the difference between a formatter and a minifier?
A formatter improves readability, while a minifier removes unnecessary whitespace to make the JSON shorter.
Why does valid JavaScript fail as JSON?
JSON is stricter than JavaScript object syntax. JSON requires double-quoted property names and does not allow comments or trailing commas.
Is my JSON uploaded?
No. The formatting, validation, and minifying logic runs locally in your browser.
Privacy note
Your input is processed locally in your browser and is not uploaded to our server.