JSON Formatter
Format and validate JSON before using it in an API, configuration file, or application. The editor reports parsing problems and produces copyable, readable output without uploading your data.
How to use this tool
- Paste or type JSON in the input editor, or load the sample to see the formatter in action.
- Choose indentation and optional sorting or minification settings, then select Format.
- Review any validation feedback and copy or download the resulting JSON.
Tips
- JSON requires double-quoted property names and string values, with no trailing commas.
- For large documents, format only after the input is complete to keep editing responsive.
Frequently asked questions
Can this tool validate invalid JSON?
Yes. It parses the input and shows an error when the document is not valid JSON, while keeping your original input available for correction.
Is JSON processed online?
No. Parsing and formatting run in your browser, so the JSON you paste is not sent to DevKit's server.