JSON Formatter & Validator

Beautify messy JSON payloads, validate syntax errors with exact line/column indicators, and minify for production.

JSON Code Editor:

{
  "app": "RunMacro",
  "version": "3.1.2",
  "platform": "Windows 10/11",
  "features": [
    "Smart Record",
    "Auto Clicker",
    "Auto Keyboard",
    "Web Automation"
  ],
  "settings": {
    "theme": "dark",
    "hotkey": "F9",
    "intervalMs": 10
  }
}

RunMacro Web Automation

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How to Format and Validate JSON

Paste Your Raw JSON Payload

Paste any JSON string or load our sample JSON structure into the editor.

Format or Minify with One Click

Choose 2-space beautification, 4-space indentation, or compact 1-line minification.

Review Diagnostics and Export

Verify syntax status, inspect byte metrics, and copy or download the formatted JSON file.

Key Features of Our JSON Utility

Precise Syntax Error Locator

Pinpoints exact error messages and positions when parsing malformed JSON payloads.

Custom Indentation Modes

Supports both standard 2-space and 4-space code styles for optimal readability.

One-Click Minifier

Strips unnecessary whitespace and line breaks to minimize payload size for network requests.

100% Client-Side Privacy

Sensitive API keys, auth tokens, and private data in your JSON never leave your browser.

Frequently Asked Questions

Clear answers about using this tool and automating workflows with RunMacro.

Why does JSON require double quotes around property keys?

The official JSON standard (RFC 8259) strictly mandates double quotes ("key") for all object properties. Single quotes or unquoted keys cause syntax errors.

Are trailing commas allowed in JSON?

No. Unlike modern JavaScript, JSON syntax prohibits trailing commas after the last item in an array or object.

Can RunMacro parse and trigger actions based on JSON API responses?

Yes! RunMacro Web Automation blocks can execute HTTP requests, parse JSON response fields, and pass data dynamically into form fields or Excel sheets.

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