JSON Formatter Online. Validate, Beautify and Convert
Format and convert JSON, CSV, XML and common JSON-compatible YAML locally in your browser.
Use the Data Formatter Below
Free Data Formatter and Converter
JSON formatting and validation use the browser’s native parser. CSV works best with flat records. XML support focuses on element-based data, while YAML support intentionally targets common JSON-compatible maps and lists rather than the entire YAML specification.
Formatting versus conversion
Formatting changes presentation without changing the data model; conversion changes the representation from one format to another. Review field names, record counts and data types whenever you move between formats with different capabilities.
Important conversion limits
Nested JSON cannot be represented in CSV without a flattening rule, and XML namespaces or mixed content need a specialized XML library. The tool returns an error when a safe conversion is not available instead of silently discarding structure.
Frequently Asked Questions
Can I validate JSON here?
Yes. JSON input is parsed before conversion, so syntax errors are reported.
Does my data leave the browser?
No conversion endpoint is used; the supported transformations run in the page.