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JSON Formatter

Paste JSON to pretty-print, validate, or minify it instantly. Everything stays in your browser — useful for API payloads, config files, and debugging.

Private by design. Runs in your browser. We don’t store what you paste.

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How it works

  1. 1Paste or type JSON into the editor.
  2. 2Click Format to pretty-print, or Minify to compact it.
  3. 3Fix any validation errors shown below the editor.

FAQ

Is my JSON sent to a server?
No. Parsing and formatting run entirely in your browser.
Does it support JSON5 or comments?
Standard JSON only. Comments and trailing commas will fail validation.