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.

Upload JSON file

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

JSON

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

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
    }
  ]
}