Free online JSON formatting, compression, syntax highlighting tool, supports real-time error validation and indentation adjustment, helps developers quickly parse, validate and beautify JSON data
One-click beautify JSON data, supports 2-space and 4-space indentation, clear and readable structure
Remove extra spaces and line breaks, reduce JSON size, improve transmission efficiency
Different colors for different data types, keys, strings, numbers一目了然
Real-time detect JSON syntax errors, precise定位 error position and cause
Quick copy formatted JSON result, convenient paste to use
All operations done locally in browser, data not uploaded to server, protects privacy
Paste or enter the JSON data you want to process in the left input box, or click "Sample" button to load sample JSON for quick experience.
Select indentation spaces (2 or 4), then click "Format" button to beautify JSON, or click "Minify" button to remove extra spaces.
View processed result on the right, syntax highlighting makes data structure clearer. If there's an error, specific error message will be shown, click "Copy" button to copy result.
View and analyze JSON data returned by API, quickly locate problems
Validate JSON data format correctness, investigate data parsing errors
Format JSON sample code, improve technical documentation readability
View and understand complex JSON data structure, analyze data hierarchy
Minify JSON data, reduce network transmission size
Validate test data JSON format, ensure data correctness
JSON (JavaScript Object Notation) is a lightweight data interchange format, based on a subset of JavaScript, uses completely language-independent text format to store and represent data. Simple and clear hierarchical structure makes JSON an ideal data interchange language.
JSON supports six data types: Object, Array, String, Number, Boolean, and null. JSON doesn't support JavaScript special types like functions, dates, regular expressions.
JSON is more concise than XML, faster parsing, smaller footprint. JSON is natively supported by JavaScript, while XML needs DOM to parse. JSON supports arrays, while XML needs nested tags to represent array structures. Most modern APIs use JSON as data interchange format.