& " 等字符与 HTML 实体互相转换,防止 XSS 与排版错乱,适用于富文本处理、代码展示等场景;无需下载、手机可用,浏览器本地处理、数据不上传、即开即用。">

HTML Entity Encode / Decode | 72Tool Free Online Development Tool

HTML Entity Encode / Decode — a free online Developer Tools tool. Runs entirely in your browser, no upload, no registration, works on phone and desktop.

HTML Entity Encode / Decode is a free online tool in the 72Tool toolbox for Development tasks. Enter your input to get instant, accurate results — handy for work, development and daily use.

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HTML Entity Encode / Decode

HTML实体编解码是一款免费的在线开发调试工具,无需下载安装、无需注册登录,打开网页即可使用。编码功能会把 <、>、&、"、\ 等特殊字符转换为对应的 HTML 实体(如 <、&),避免在网页中被当作标签解析;解码则把实体还原为原始字符。解码基于浏览器原生能力,可识别命名实体与数字实体。所有处理均在浏览器本地完成,数据不上传服务器。

HTML实体编解码适用于在页面中安全展示代码片段、处理富文本内容、防止 XSS 注入、修复实体乱码等场景。作为一款轻量在线工具,它免去了手动查表替换的麻烦,随开随用,是前端开发与内容处理中的实用小工具。

使用教程
  1. 在输入框粘贴需要处理的内容。
  2. 点击「编码为 HTML 实体」把特殊字符转义。
  3. 或点击「解码还原原文」把实体还原为字符。
  4. 在结果区复制所需内容。
常见问题
Q1:编码了哪些字符?
A:主要转义 < > & " 与单引号,可满足网页安全展示需求。
Q2:解码支持数字实体吗?
A:支持,基于浏览器原生解析,命名实体与 &#xxx; 数字实体均可还原。
Q3:数据会上传吗?
A:不会,全部在浏览器本地处理。
Q4:解码安全吗?
A:安全,使用 textarea 解析不会执行任何脚本。
Q5:能防止 XSS 吗?
A:编码后特殊字符不会被当作标签解析,可有效降低 XSS 风险,但后端仍应做校验。
HTML实体编解码可以在手机上使用吗?
A:可以,本工具基于网页运行,手机、平板、电脑均可直接打开网页使用,无需安装 App。
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Features & Use Cases

HTML Entity Encode / Decode is a free online Developer Tools tool. No download or registration is required — just open the page and use it instantly. All processing runs locally in your browser, so your files and data never leave your device, keeping everything private.

How to Use
  1. Enter or paste the content you want to process into the input area.
  2. Set any options you need (such as units or modes) from the controls on the page.
  3. Click the action button and let the tool process everything locally in your browser.
  4. View the result, then copy or download it as needed.
FAQ
Q:Is the result accurate?
A:It uses standard algorithms and conversion factors, accurate enough for everyday and work use.
Q:Do I need to install anything?
A:No. It is a pure browser tool — paste your code/text and get the result instantly.
Q:Can I use it on my phone?
A:Yes. It runs in any modern browser on phone, tablet, or desktop — no app install needed.
Q:Is it really free?
A:Yes, this tool is completely free to use, with no login required.
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Note: HTML Entity Encode / Decode runs entirely in your browser; your data is not uploaded to any server. Explore more free online tools on the 72Tool homepage.