🧬 Base64 转 UTF-8 文本Convert Base64 to UTF-8

使用说明与常见问题How-to & FAQ

「Base64 转 UTF-8 文本」是什么？What is the Convert Base64 to UTF-8 tool?

把 Base64（含 URL 安全变体、缺少填充或带换行）解码成 UTF-8 文本。本地处理。Decode Base64, including the URL-safe variant, missing padding and line breaks, into UTF-8 text. Processed locally.

如何使用「Base64 转 UTF-8 文本」？How do I use the Convert Base64 to UTF-8 tool?

在「Base64 转 UTF-8 文本」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。例如输入「SGk=」，得到「Hi」。In the Convert Base64 to UTF-8: Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it. Example: "SGk=" → "Hi".

支持哪些 Base64 写法？Which Base64 forms are accepted?

标准 Base64、URL 安全变体（用 - 和 _ 代替 + 和 /）、缺少结尾 = 填充的写法，以及中间带空格或换行的文本。Standard Base64, the URL-safe variant that uses - and _ instead of + and /, input missing the trailing = padding, and text with spaces or line breaks in it.

开头的 BOM 怎么处理？What happens to a leading BOM?

如果解码出的字节以 UTF-8 BOM（EF BB BF）开头，它会被去掉，结果下方会写明“已去掉开头的 UTF-8 BOM”，这样不会在文本前留下看不见的字符。If the decoded bytes start with a UTF-8 BOM (EF BB BF) it is removed and the line below the result says so, so no invisible character is left at the start of the text.

输入和输出是什么样的？What does the input and output look like?

例如在「Base64 转 UTF-8 文本」中输入 SGk=，输出为：Hi。For example, the Convert Base64 to UTF-8 turns the input SGk= into: Hi.

编码和加密有什么区别？Is encoding the same as encryption?

编码（如 Base64、URL 编码）可直接还原，不提供保密性；加密需要密钥。「Base64 转 UTF-8 文本」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The Convert Base64 to UTF-8 works fully offline in your browser.

「Base64 转 UTF-8 文本」免费吗？需要注册吗？Is the Convert Base64 to UTF-8 free? Do I need an account?

「Base64 转 UTF-8 文本」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 Base64 to UTF-8 is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.