DUL Data Utility Labs

JSON and CSV - Private browser tool

JSON Formatter

Format, validate, and minify JSON locally in the browser for API debugging and data cleanup.

Use the tool Read FAQ 
{
  "user": {
    "id": 42,
    "name": "Ada Lovelace",
    "roles": ["analyst", "admin"]
  },
  "account": {
    "plan": "pro",
    "limits": { "exports": 1000 }
  }
}

JSON Formatter

Private, browser-based, free to use.

What this tool helps you do

Format, validate, and minify JSON locally in the browser for API debugging and data cleanup. Paste your data, run the tool, copy the result, and move on. The core workflow stays on one focused page.

Best use cases

  • Convert or clean data before importing it into spreadsheets, BI tools, databases, or internal apps.
  • Debug API payloads, logs, tokens, encodings, regular expressions, and text transformations.
  • Create lightweight examples for documentation, tests, tutorials, customer support, and team handoffs.

Related tools

JSON FlattenerJSON Schema GeneratorJSON to YAML ConverterJSON to CSV ConverterJSON to CSV ConverterCSV to JSON ConverterJSON FlattenerJSON Schema Generator

JSON Formatter FAQ

Does it validate JSON?

Yes. Invalid JSON shows a readable parse error.

Can I minify JSON?

Use the minify option in the tool controls.

Does formatting change values?

No. It only changes whitespace and indentation.