JSON Formatter
Format, validate, and minify JSON instantly. Runs 100% in your browser.
What is JSON formatting?
JSON (JavaScript Object Notation) is a lightweight data-interchange format used everywhere on the web. A JSON formatter takes compact or malformed JSON and outputs a human-readable, indented version — essential for debugging API responses, reading config files, and reviewing payloads.
How to use this tool
Paste your JSON in the input area, pick an indent size (2, 4, or tab), and click Format. If the JSON is invalid, you'll see the parser error. Use Minify to produce a compact single-line version for transmission or storage.