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JSON Formatter & Validator – Pretty Print, Minify, Sort Keys (Free Online)

JSON Formatter & Validator – Pretty Print, Minify, Sort Keys

Format and validate JSON instantly. This free tool can pretty-print, minify, sort keys, and lets you copy or download the result. Everything runs in your browser—no uploads.

JSON Formatter & Validator

Or drop a file anywhere in this box

Tips

  • Validate first if you’re unsure the JSON is valid.
  • Use Sort Keys before running a diff in Git or comparing configs.
  • Switch indentation between 2 / 4 / Tab to match your project style.
  • Drag & drop a .json file directly into the input area.

FAQ – JSON Formatter & Validator

Why does my JSON fail to parse?

Common issues: trailing commas, single quotes, comments, or unescaped characters. JSON requires double-quoted strings and no comments.

Can I format huge files?

Yes, within your browser’s memory limits. For very large files, consider splitting them first.

Does the tool support JSON5 or comments?

No. It follows strict JSON. Remove comments/trailing commas before validating.

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