JSON Formatter

How this tool works

JSON (JavaScript Object Notation) is a text format for structured data. A formatter makes valid JSON easier to inspect by adding indentation, while the minify option removes unnecessary whitespace for compact output.

How to use it

1. Paste a JSON object or array into the input area.
2. Choose Format JSON for indented output or Minify for compact output.
3. If the tool reports invalid JSON, check quotation marks, commas, brackets and braces.

Example and practical tips

A compact object such as {"name":"ToolNest","free":true} becomes easier to read when its properties are arranged on separate indented lines.

The tool checks JSON syntax by parsing the text. It does not validate whether the data follows a specific API schema, whether values are factually correct or whether the receiving application accepts the structure.

Frequently asked questions

Why is my JavaScript object rejected?

JSON requires double-quoted property names and strings and does not allow comments or trailing commas.

Does formatting change the data?

For valid JSON, it changes whitespace and layout while retaining the represented values.