🧩 JSON5 转 JSON（JSON5 校验与格式化）JSON5 to JSON Converter & Validator

使用说明与常见问题How-to & FAQ

「JSON5 转 JSON（JSON5 校验与格式化）」是什么？What is the JSON5 to JSON Converter & Validator tool?

把 JSON5 转换成标准 JSON，或把 JSON 写成更易读的 JSON5：支持注释、末尾逗号、单引号字符串、不加引号的键名、十六进制数、Infinity/NaN、多行字符串，出错时指出行号、列号并标出位置；键的顺序和大整数的每一位都原样保留。全部在浏览器本地完成。Convert JSON5 to standard JSON, or write JSON as more readable JSON5. Comments, trailing commas, single-quoted strings, unquoted keys, hex numbers, Infinity/NaN and multi-line strings are supported; errors show the line and column with a pointer. Key order and every digit of large integers are kept exactly. Everything runs locally in your browser.

如何使用「JSON5 转 JSON（JSON5 校验与格式化）」？How do I use the JSON5 to JSON Converter & Validator tool?

在「JSON5 转 JSON（JSON5 校验与格式化）」中，把内容粘贴或输入到上方输入框，按需设置「转换为」、「格式」、「JSON5 字符串引号」，结果会实时显示在下方，点击「复制结果」即可复制。In the JSON5 to JSON Converter & Validator: Paste or type into the input box, adjust "Convert to", "Format", "JSON5 string quotes"; the result appears below instantly — click "Copy result" to copy it.

JSON5 和 JSON 有什么区别？How is JSON5 different from JSON?

JSON5 是 JSON 的扩展，常用于配置文件：可以写 // 和 /* */ 注释，对象和数组末尾可以多一个逗号，字符串可以用单引号，键名是合法标识符时可以不加引号，数字可以写成十六进制（0x1F）、以小数点开头或结尾（.5、5.）、带正号，并支持 Infinity 和 NaN；字符串行尾加反斜杠可以换行续写。所有合法的 JSON 也都是合法的 JSON5。JSON5 extends JSON and is popular for config files: // and /* */ comments, trailing commas in objects and arrays, single-quoted strings, unquoted keys when they are valid identifiers, hex numbers (0x1F), leading or trailing decimal points (.5, 5.), a plus sign, Infinity and NaN, and strings continued across lines with a trailing backslash. Every valid JSON document is also valid JSON5.

Infinity 和 NaN 转成 JSON 会怎样？What happens to Infinity and NaN in JSON?

标准 JSON 没有 Infinity 和 NaN，这和 JavaScript 的 JSON.stringify 一样会写成 null，并在结果下方提示一共替换了几个。输出 JSON5 时会原样保留。Standard JSON has no Infinity or NaN, so, like JavaScript's JSON.stringify, they are written as null and a note below the result says how many were replaced. JSON5 output keeps them as they are.

大数字和键的顺序会变吗？Are large numbers and key order preserved?

不会变。工具自己解析文本，不经过 JavaScript 的数字类型，所以 12345678901234567890 这样的大整数和 0.1000 这样的小数每一位都原样保留（十六进制会换算成十进制）；键的顺序也和原文一致，包括 "2"、"1" 这样的数字键。同一个对象里出现重复的键时保留最后一个值并给出提示。Yes. The text is parsed directly rather than through JavaScript numbers, so a large integer such as 12345678901234567890 or a decimal like 0.1000 keeps every digit (hex is converted to decimal), and keys stay in their original order, including numeric keys such as "2" and "1". If a key repeats in one object, the last value is kept and a note says so.

大段 JSON5 会卡住吗？Will a large JSON5 freeze the page?

粘贴没问题：大约 240 KB 的内容粘贴后通常一秒内就能转换完。卡住多半是因为在输入框里用键盘一个个字符敲进去（或自动化工具用模拟打字往框里填），浏览器每敲一个字都要重排超长文本，会越来越慢。请用 Ctrl+V / ⌘V 粘贴，或点选文件导入。Paste is fine: about 240 KB usually converts within a second after you paste. Freezes usually come from typing into the box character by character (or automation that simulates typing), because the browser reflows a huge textarea on every keystroke. Use Ctrl+V / ⌘V to paste, or load from a file.

出错时怎么定位？How do I find an error?

结果里会显示第几行、第几列和出错原因，例如缺少逗号、字符串里直接换行、数字以 0 开头、注释没有结束、多了一个逗号等，并在代码片段里用 ^ 标出位置。改正后结果会立即刷新。The result shows the line, column and reason, such as a missing comma, a raw line break in a string, a number with a leading zero, an unclosed comment or an extra comma, with a ^ marking the spot in a code snippet. Fix it and the result refreshes immediately.

数据会上传吗？Is my data uploaded?

不会，全部在浏览器本地处理。No — everything is processed locally in your browser.

「JSON5 转 JSON（JSON5 校验与格式化）」免费吗？需要注册吗？Is the JSON5 to JSON Converter & Validator free? Do I need an account?

「JSON5 转 JSON（JSON5 校验与格式化）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The JSON5 to JSON Converter & Validator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.