Json Formatter

JSON / YAML Formatter

Formats, validates, minifies, and converts between JSON and YAML.

Operations

Pretty-Print JSON

Input: minified or messy JSON → Output: indented, readable JSON

// Input:
{"id":"abc","sets":[{"weight":100,"reps":5}],"completedAt":"2026-04-08T10:00:00Z"}

// Output (2-space indent, sorted keys optional):
{
  "completedAt": "2026-04-08T10:00:00Z",
  "id": "abc",
  "sets": [
    {
      "reps": 5,
      "weight": 100
    }
  ]
}

Minify JSON

Input: pretty JSON → Output: single-line, no whitespace

Validate JSON

Check for: unclosed brackets, trailing commas, unquoted keys, single quotes (not valid JSON) Report the exact line and character of the error.

JSON → YAML