JSON Formatter and Validator
100% PrivateData & JSON ToolsFormat JSON with your choice of indentation, validate it and explore its structure.
Runs entirely in your browser. Your input is not uploaded to Ovatly or anywhere else.
- 1Paste your JSON into the input box.
- 2Choose an indent size if you plan to format.
- 3Press Format to pretty-print, Minify to compress, or Validate only to check without changing anything.
- 4Copy the result from the result panel, or read the plain-language error and fix the input.
Input: {"name":"Ovatly","tools":250,"free":true} Formatted output: { "name": "Ovatly", "tools": 250, "free": true }
- Validation follows the strict JSON standard: trailing commas, single-quoted strings and unquoted keys are all invalid JSON and will be reported.
- Very large pastes (tens of megabytes) may take a moment because parsing happens on your device.
- Number precision follows JavaScript: integers beyond 2^53 can lose exactness when reformatted.
The error message under the result names the problem the parser found, such as an unexpected character or a missing comma. Common causes are trailing commas, single quotes, and comments, none of which JSON allows.
About this tool
The JSON Formatter and Validator pretty-prints JSON with your choice of two or four space indentation, minifies it back to one line, and validates it with an error message in plain words when it will not parse. Developers use it to read API responses, check config files and clean up payloads before sending them.
Related tools
Part of Ovatly's free tools in Data & JSON Tools.