JSON Beautify
Format compressed JSON into readable indented format with custom indent size
📊 JSON Formatter Tool - Free Online JSON Beautify, Minify & Validation
Professional JSON processing tool supporting formatting beautification, compression, syntax validation and more. Provides syntax highlighting, error prompts, custom formatting options, completely free to use.
Completely Free
Syntax Highlighting
Error Detection
Fast Processing
✨ JSON Formatter Tool Features
JSON Minify
Remove all unnecessary whitespace characters to minimize JSON file size
JSON Validation
Check JSON syntax correctness with detailed error messages and positions
Syntax Highlighting
Provide syntax highlighting to make JSON structure clearer and easier to read
Key Sorting
Support alphabetical key sorting for easier comparison and searching
Statistics
Display detailed statistics including file size, line count, structure depth
JSON Input
Professional JSON processing tool supporting formatting beautification, compression, syntax validation and more. Provides syntax highlighting, error prompts, custom formatting options, completely free to use.
Completely Free
Secure & Reliable
No Usage Limits
Formatting Options
Statistics
File Size (Bytes): 0
Lines: 0
JSON Input
0 / 1MB
JSON Output
JSON JSON syntax validation failed
JSON Examples
Select example JSON to test formatting features
Usage Instructions
1️⃣
Input JSON
Paste or enter your JSON content in the left input box
2️⃣
Select Operation
Choose beautify, minify, or validate operation and set formatting options
3️⃣
View Results
View processing results on the right, copy or download formatted JSON
Detailed Feature Description
JSON Beautify Formatting
Convert compressed or messy JSON into readable format with proper indentation and line breaks. Supports custom indent size (1-8 spaces) and key sorting.
JSON Minification
Remove all unnecessary whitespace, line breaks, and indentation from JSON to minimize file size, suitable for production environments or network transmission.
JSON Syntax Validation
Check if JSON syntax conforms to standards, identify and mark error positions, provide detailed error descriptions to help quickly locate and fix issues.
常見問題（FAQ）
將壓縮成一行的 JSON 展開為帶縮排的可讀格式，方便除錯、閱讀 API 回應、或檢查設定檔內容。
常見原因：屬性名稱沒有加雙引號（JSON 不接受單引號）、最後一個元素後面有多餘的逗號、或包含了 JavaScript 的 undefined、函式等非 JSON 標準值。
JSON 是純文字格式，屬性名稱必須用雙引號；JavaScript 物件的屬性名稱可以不加引號，且可包含函式、undefined 等值。JSON.parse() 可將 JSON 字串轉為 JS 物件，JSON.stringify() 可反向轉換。
不會。格式化處理完全在本地端或伺服器即時完成，不會留下任何記錄。