JSON Formatter & Validator
Format, validate, beautify, and minify JSON data instantly in your browser.
jq-style Filter
Filter the input JSON with dot paths, array expansion, selections, projections, and length. Example: .users[] | select(.active == true) | {id, name}
Why Format JSON Data?
JSON is the standard format for web APIs and configuration files, and responses often arrive minified. Formatting reintroduces indentation and line breaks so nested structures become readable.
Everything runs in your browser using the built-in JSON parser, so no data is uploaded.
Format, Minify, and Filter in One Place
Use Beautify / Format for a two-space indented view, Minify JSON for a compact version, or the jq-style filter to extract just the fields you need. Validation and filter errors are reported separately using the parser's own message.
The formatter accepts any valid JSON value, including deeply nested objects and arrays.
Frequently Asked Questions
What is JSON formatting?
Formatting (also called beautifying) reprints JSON with two-space indentation and line breaks so nested objects and arrays are easier to read.
Can this tool validate JSON?
Yes. When the input cannot be parsed, the tool shows the error message from the browser's JSON parser, which typically includes the position of the problem. When it parses, the formatted output confirms the JSON is valid.
What is JSON minification?
Minification reprints the JSON with no extra whitespace by running JSON.parse and JSON.stringify, producing a compact single line for transport or storage.
What can the jq-style filter do?
It supports dot paths, array expansion with [], index access, select() comparisons, object projections, map(), and length. For example, .users[] | select(.active == true) | {id, name} returns the id and name of active users.