Your JSON stays in your browser. Formatting, minification, validation, and copying happen locally, so the JSON content is not sent to TheToolSite.
How to Use the JSON Formatter
- Paste JSON into the input box.
- Choose Format JSON for readable indentation or Minify JSON for compact output.
- If validation succeeds, review or copy the result.
- If an error appears, correct the nearby syntax and try again.
How JSON Formatting and Validation Work
The tool parses the JSON text into its data structure. If parsing succeeds, it serializes the same values with consistent two-space indentation or no extra whitespace. Formatting changes presentation, not the strings, numbers, booleans, null values, arrays, or objects represented by valid JSON.
JSON requires double quotes around property names and strings. It does not allow comments, trailing commas, single-quoted strings, NaN, Infinity, undefined, or unescaped control characters.
JSON Formatter Example
Compact input
{"name":"Ada","active":true,"skills":["math","code"]}
Readable output
The formatter places each property and array item on an indented line while preserving the same data. Minify removes those optional spaces and line breaks again.
Common JSON Errors
Typical errors include a missing comma between properties, a trailing comma before a closing brace, an unquoted property name, a single quote instead of a double quote, or a missing closing bracket. The reported location is a starting point; the actual mistake may appear immediately before it.
JSON Formatter Security
Local processing reduces unnecessary data transfer, but copied output and screenshots can still expose secrets. Redact access tokens, personal data, private URLs, and production credentials before sharing JSON with another person or service.