JSON Formatter
Format, minify, and validate JSON instantly. Everything runs locally in your browser.
Your JSON is processed entirely in your browser using native JSON.parse() and JSON.stringify(). No data is ever transmitted or stored on our servers.
About JSON Formatting
JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. APIs, configuration files, and databases all use JSON extensively. A good formatter makes it easy to read, debug, and validate JSON data.
Format vs. Minify
Formatting (pretty-printing) adds indentation and line breaks to make JSON human-readable. Use it when debugging API responses, reading config files, or reviewing data structures.
Minification removes all unnecessary whitespace, producing the smallest possible output. Use it to reduce payload size for API requests, log entries, or storage.
Common JSON Errors
- Trailing commas after the last property or array element
- Single quotes instead of double quotes for strings
- Unquoted property names (valid in JS, not in JSON)
- Comments (JSON does not support comments)
- Missing commas between properties