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JSON Formatter

Format (pretty-print) or minify JSON in your browser.

or drag and drop

JSON or TXT up to ~10MB

Indent:

Preview

Upload a file or paste JSON to see the preview
About this JSON Formatter

Format or minify JSON in your browser. Pretty-print with 2 or 4 spaces or tabs, or compact to a single line for smaller payloads. Invalid JSON is caught with clear error messages. Everything runs locally—no upload required.

  • Pretty or compact output with adjustable indentation.
  • Validates input and highlights parse errors.
  • Copy or download the formatted result instantly.
  • Related tools: CSV to JSON · JSON to CSV

Usage Tips

  • 1

    Provide valid JSON (object or array).

  • 2

    Use Pretty mode with your preferred indentation for readability.

  • 3

    Use Compact mode to minimize file size (no unnecessary whitespace).

  • 4

    All processing happens in your browser — your data is never uploaded.