JSON Formatter

Format, validate and minify JSON online for free. Pretty-print JSON with syntax highlighting and locate syntax errors instantly — right in your browser.

JSON input

{
  "name": "blackdroid.dev",
  "tools": ["json-formatter", "regex-tester"],
  "free": true,
  "visits": null,
  "version": 1.0
}

Formatted output

{
  "name": "blackdroid.dev",
  "tools": [
    "json-formatter",
    "regex-tester"
  ],
  "free": true,
  "visits": null,
  "version": 1
}

About JSON Formatter

Paste any JSON document to format it with consistent indentation and syntax highlighting, or compress it to a single line with the minify option.

The built-in validator reports syntax errors with their exact position so invalid JSON is easy to fix. Everything runs locally in your browser — your data is never uploaded to a server.