JSON Formatter
Format, validate and query JSON, or convert it to YAML, CSV or TOML.
How to json formatter
- Paste JSON into the editor, or upload a .json file.
- Choose an action — format, minify, validate, sort keys or run a JSONPath query.
- Copy the result or download the file.
About this tool
JSON formatting is the simplest operation here and the most frequently needed. Minified API responses — a single line of text with no whitespace — are impossible to read. Paste them in, click format, and the tree structure becomes visible. The validator shows exactly where a syntax error is, which saves hunting through a thousand characters for a missing comma.
The format conversions are more opinionated. JSON to YAML is straightforward — YAML is a superset of JSON, so every valid JSON document is also valid YAML, and the conversion is lossless. JSON to CSV requires the input to be an array of flat objects. JSON to TOML requires flat key-value structure. These constraints are inherent in the target formats, not limitations of this tool.