JSON Formatter & Validator

Format, validate, and beautify JSON data instantly

FmtAny provides a free online JSON formatter that processes data locally in your browser. Features include real-time validation, syntax highlighting, tree view visualization, and minification.

Indent
Valid JSON· Type: object · Keys: 10 · Size: 231B
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Output

Free Online JSON Formatter & Validator

Format, validate, and beautify JSON data instantly. Free online JSON formatter with real-time validation, syntax highlighting, and tree view.

Key Features

  • Instant JSON formatting with customizable indentation (2 or 4 spaces)
  • Real-time validation with detailed error messages
  • Tree view for easy navigation of nested JSON structures
  • JSON repair tool to fix common formatting issues

How to Use

  1. 1.Paste your JSON data into the input panel
  2. 2.Click "Format" to beautify or use other tools like Minify, Validate, or Repair
  3. 3.Copy the formatted output or download it as a file