JSON Formatter
Format, beautify, and compress JSON data with real-time syntax checking and error detection
Input JSON
Formatted JSON
Usage Instructions
Input JSON Data
Paste or input JSON text in the left input box. Supports JSON and JSONC formats, including comments.
Auto Formatting
Enable 'Auto Format' switch for real-time formatting. You can also click the 'Format' button to trigger manually.
Compression and Beautification
Click the 'Compress' button to compress JSON into one line, click again to restore beautified format. Supports one-click download of formatted files.
Code Folding
Use the fold icon to fold/unfold JSON data by level, making it easier to view the structure of large JSON files.
Fullscreen Mode
Click the fullscreen icon to toggle fullscreen mode, providing a larger editing space suitable for handling complex JSON data.
Error Tips
If the input JSON format is incorrect, detailed error information will be displayed, including error location and cause, helping to quickly locate issues.
Keyboard Shortcuts
Core Features
Smart Formatting
Automatically recognize JSON structure, provide beautiful indentation and line breaks
Real-time Validation
Instantly check JSON syntax, provide precise error location hints
One-click Compression
Quickly compress JSON into a single line, reduce file size
Code Folding
Support folding/unfolding by level, convenient for viewing large JSON
Syntax Highlighting
Different data types use different colors, improving readability
Convenient Operations
Support copy, download, fullscreen and other practical functions
JSON Introduction
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format. It is based on a subset of the JavaScript programming language, but its use is not limited to JavaScript. JSON is a completely language-independent text format that is easy for humans to read and write, and also easy for machines to parse and generate.
History of JSON
JSON was first proposed by Douglas Crockford in 2001. It was initially developed as a subset of JavaScript but was quickly adopted as an independent data format. In 2006, JSON was officially standardized as ECMA-404 and became ISO/IEC 21778:2017 in 2013.
JSON Features
- Lightweight: JSON format is more concise than XML, with smaller data volume
- Readability: JSON format is easy for humans to read and write
- Cross-platform: Supports multiple programming languages and platforms
- Self-describing: Clear data structure, easy to understand
- Efficient: Fast parsing and generation
Code Examples
// JavaScript Example const jsonString = '{"name":"John","age":25}'; const formatted = JSON.stringify(JSON.parse(jsonString), null, 2); console.log(formatted);
Usage Tips
Use Ctrl + Enter to quickly process
Support drag and drop files into the editor
Click the fullscreen icon to toggle fullscreen mode
All Tools
JSON Formatter
Format, beautify, and compress JSON data with real-time syntax checking
JSON Validator
Validate JSON syntax and structure with detailed error reporting
JSON Schema Generator
Generate JSON Schema from JSON data with automatic type inference
JSON to XML
Convert JSON data to well-formatted XML with automatic structure mapping
JSON to YAML
Convert JSON data to YAML format with proper indentation and structure
JSON to CSV
Convert JSON arrays to CSV format for spreadsheet applications