🧱 JSON 转 BSON（十六进制）Convert JSON to BSON
把 JSON 编码为 BSON 二进制并以十六进制（或 Base64）显示，支持常见类型（对象、数组、字符串、数字、布尔、null）。本地处理。Encode JSON as BSON and show it as hex (or Base64). Supports common types (object, array, string, number, boolean, null). Processed locally.
使用说明与常见问题How-to & FAQ
「JSON 转 BSON（十六进制）」是什么？What is the Convert JSON to BSON tool?
把 JSON 编码为 BSON 二进制并以十六进制（或 Base64）显示，支持常见类型（对象、数组、字符串、数字、布尔、null）。本地处理。Encode JSON as BSON and show it as hex (or Base64). Supports common types (object, array, string, number, boolean, null). Processed locally.
如何使用「JSON 转 BSON（十六进制）」？How do I use the Convert JSON to BSON tool?
在「JSON 转 BSON（十六进制）」中，把内容粘贴或输入到上方输入框，结果会实时显示在下方，点击「复制结果」即可复制。In the Convert JSON to BSON: Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it.
完整 BSON 吗？Is this full BSON?
覆盖常用类型；ObjectId、Date、Binary 等扩展类型未实现。Common types are covered; ObjectId, Date, Binary and other extensions are not.
整数怎样编码？How are integers encoded?
按原文精确处理：int32 范围内用 int32（类型 0x10），更大的用 int64（0x12），例如 9007199254740993 精确存成 int64；超出 int64 的整数会报错并说明，不会悄悄变成 double。带小数点或指数的数用 double（0x01）。Exactly as written: values in the int32 range use int32 (type 0x10), larger ones int64 (0x12), so 9007199254740993 is stored exactly as int64; integers beyond int64 give a clear error instead of silently becoming a double. Numbers with a decimal point or exponent use double (0x01).
大数字和重复键会怎样？What about big numbers and duplicate keys?
数字按原文保留，不经过 JavaScript 浮点：12345678901234567890、1e400、1.50 原样输出，不会变成 12345678901234567000、Infinity 或 1.5。重复的键按 JSON 规则保留最后一个值，并在结果下方提示是哪个键。语法错误会写出第几行第几列。Numbers are kept exactly as written, with no JavaScript floating-point step: 12345678901234567890, 1e400 and 1.50 come out unchanged instead of 12345678901234567000, Infinity or 1.5. Duplicate keys keep the last value, as JSON parsers do, and a notice below the result names the key. Syntax errors give the line and column.
输入和输出是什么样的？What does the input and output look like?
例如在「JSON 转 BSON（十六进制）」中输入 {"a":1}，「十六进制加空格」设为 勾选，输出为：0c 00 00 00 10 61 00 01 00 00 00 00。For example, the Convert JSON to BSON turns the input {"a":1}, "Space hex bytes" set to on into: 0c 00 00 00 10 61 00 01 00 00 00 00.
有哪些选项可以调整？What options can I adjust?
「JSON 转 BSON（十六进制）」的设置：可勾选：「十六进制加空格」（默认勾选）、「输出 Base64」。每次生成结果都按当前设置处理。Settings in the Convert JSON to BSON — tick boxes: "Space hex bytes" (on by default), "Output Base64". The result always uses the current settings.
代码或数据会被上传吗？Is my code or data uploaded?
不会。「JSON 转 BSON（十六进制）」完全用 JavaScript 在本地运行，适合处理含有密钥、内部接口等敏感内容的数据。No. The Convert JSON to BSON runs entirely in local JavaScript, so it is safe for data containing keys or internal endpoints.
「JSON 转 BSON（十六进制）」免费吗？需要注册吗？Is the Convert JSON to BSON free? Do I need an account?
「JSON 转 BSON（十六进制）」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 Convert JSON to BSON is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.