Dev Tools

JSON Parser & Linter

Paste JSON or drop a file to validate, format, and inspect your payload. Everything runs locally in your browser.

Input
Upload a .json file or work directly in the editor. Formatting happens client-side.

Files never leave your device; they are read with the FileReader API.

Tip: Press Ctrl/Cmd + Enter to format with the current indentation.

Validation
Parsing runs automatically as you type.
Valid JSON
Root type
object
Characters
134
Size
134 B
Keys
3
Formatted Preview
Prettified output uses two-space indentation by default.
{
  "name": "Example",
  "version": 1,
  "items": [
    {
      "id": "alpha",
      "active": true
    },
    {
      "id": "beta",
      "active": false
    }
  ]
}