Text utilities

JSON Formatter

Validate JSON syntax and format it with indentation or compact spacing.

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Data workspace
Data workspace

Check delimiters and structure before downloading the output.

See the method

Your source data

Runs on your device

Your transformed data

Your result

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Use the Calculate button to see your result.

Your content is processed locally.

How to use this tool

  1. Enter json, mode.
  2. Select Update result to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
JSONKeep the structure and separators shown in the sample. Line breaks are retained in this input.{"name":"ClarityKit","tools":100}
ModeChoose Pretty print / Compact.Pretty print

Result for these sample inputs

{
  "name": "ClarityKit",
  "tools": 100
}
Valid JSON
Yes

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

Continue this task

The method, explained

Parse the input as JSON, then serialize the resulting value with two-space indentation or no extra whitespace.

A WORKED EXAMPLE

The input {"a":1,"b":[2,3]} can be expanded into an indented object or kept compact while remaining valid JSON.

What to keep in mind

Duplicate object keys retain the last value. Large numeric literals may lose precision in JavaScript, and key ordering may change. Do not use this to preserve signed byte-for-byte payloads.

Common questions

Are comments allowed?

No. Standard JSON does not allow comments or trailing commas.

Does valid JSON mean the data has the right structure?

No. Syntax validation is different from validating a business schema or required fields.

Methodology maintained by ClarityKit. How these tools are built and checked.