What is a JSON Formatter?
JSON (JavaScript Object Notation) is the standard data format used by APIs and web applications. However, machines often output JSON as a single, massive line of text without spaces (minified), making it impossible for humans to read or debug. This tool "prettifies" the data by adding line breaks, indentation, and formatting.
JSON Validator & Debugger
If you have a missing comma, an unclosed bracket, or an extra quote, parsing JSON will fail. Our tool automatically attempts to parse your input and will throw a precise error message telling you exactly why your JSON syntax is invalid so you can fix it.
Secure Client-Side Parsing
Developers frequently work with sensitive data, API keys, or private user information in JSON payloads. You should never paste sensitive data into random online tools. Our JSON formatter runs entirely via JavaScript in your local browser. The data never leaves your computer.