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🔗 Data URI 转 UTF-8 文本Convert Data URI to UTF-8
从文本类 data: URI（百分号编码或 ;base64）取出文字，按 URI 里的 charset 解码（默认 UTF-8）。本地处理。Extract the text from a text data: URI (percent-encoded or ;base64), decoded with the charset named in the URI (UTF-8 by default). Processed locally.
使用说明与常见问题How-to & FAQ
「Data URI 转 UTF-8 文本」是什么？What is the Convert Data URI to UTF-8 tool?
从文本类 data: URI（百分号编码或 ;base64）取出文字，按 URI 里的 charset 解码（默认 UTF-8）。本地处理。Extract the text from a text data: URI (percent-encoded or ;base64), decoded with the charset named in the URI (UTF-8 by default). Processed locally.
如何使用「Data URI 转 UTF-8 文本」？How do I use the Convert Data URI to UTF-8 tool?
在「Data URI 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「data:text/plain,Hi」，得到「Hi」。In the Convert Data URI to UTF-8: Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it. Example: "data:text/plain,Hi" → "Hi".
支持哪些字符集？Which charsets are supported?
按 URI 里的 charset 参数解码：utf-8（未写 charset 时默认）、utf-16le、utf-16be、iso-8859-1、windows-1252、gbk、gb18030、big5、shift_jis 等浏览器支持的编码都可以；不支持的会直接报错。注意按浏览器标准，iso-8859-1 实际按 windows-1252 解码，utf-16 等同 utf-16le。The charset parameter in the URI is used: utf-8 (the default when no charset is given), utf-16le, utf-16be, iso-8859-1, windows-1252, gbk, gb18030, big5, shift_jis and the other encodings the browser supports. An unsupported charset gives a clear error. As in browsers, iso-8859-1 is decoded as windows-1252 and utf-16 means utf-16le.
百分号形式里的 + 是空格吗？Is + a space in the percent form?
不是。data URI 不是表单编码，+ 就是加号本身；空格要写成 %20。No. A data URI is not form encoding, so + is a literal plus sign; a space must be written as %20.
图片等非文本 data URI 能解码吗？Can it decode image or other non-text data URIs?
不能。MIME 类型不是文本（如 image/png、application/octet-stream）时会提示「这不是文本 data URI」。文本类包括 text/*、application/json、application/xml、*+xml、*+json 等。No. If the MIME type is not a text type (such as image/png or application/octet-stream) you get a "not a text data URI" message. Text types include text/*, application/json, application/xml, *+xml and *+json.
字节无效时会怎样？What happens with invalid bytes?
UTF-8 会指出第一个出错的字节位置和原因（如过长编码、被截断、代理区码位）；其他字符集会说明字节不是该编码的有效文本。开头的 BOM 会被去掉并给出提示。For UTF-8 the first bad byte is reported with its position and the reason (overlong, truncated, surrogate and so on); for other charsets you are told the bytes are not valid text in that encoding. A leading BOM is removed, with a note.
输入和输出是什么样的？What does the input and output look like?
例如在「Data URI 转 UTF-8 文本」中输入 data:text/plain,Hi，输出为：Hi。For example, the Convert Data URI to UTF-8 turns the input data:text/plain,Hi 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。「Data URI 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 Data URI to UTF-8 works fully offline in your browser.
「Data URI 转 UTF-8 文本」免费吗？需要注册吗？Is the Convert Data URI to UTF-8 free? Do I need an account?
「Data URI 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 Data URI 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.