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<!doctype html>
<html lang="zh-CN">
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<meta charset="UTF-8" />
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<title>
SQL 转 ER 图在线工具 · Chen 模型生成器 | SQL / DBML to ER Diagram — sql2er
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<meta
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content="免费在线 SQL 转 ER 图工具：把 CREATE TABLE 建表语句或 DBML 一键生成 Chen 模型实体-关系图。纯前端运行，数据不出浏览器，无需登录、不埋点；支持 PostgreSQL / MySQL / SQLite 语法，节点可拖动、双击改名，可导出 SVG / PNG。Free online tool to convert SQL & DBML into Chen-model ER diagrams, 100% client-side and open source."
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"description": "sql2er 是一个免费、开源、纯前端的在线工具，把 SQL CREATE TABLE 语句或 DBML 转换为 Chen 模型的实体-关系图，支持力导向布局、节点编辑与 SVG / PNG 导出。",
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<!-- ── Favicon (inline SVG, network/diagram icon) ── -->
<link
rel="icon"
type="image/svg+xml"
href="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23D97757' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='16' y='16' width='6' height='6' rx='1'/%3E%3Crect x='2' y='16' width='6' height='6' rx='1'/%3E%3Crect x='9' y='2' width='6' height='6' rx='1'/%3E%3Cpath d='M5 16v-3a1 1 0 0 1 1-1h12a1 1 0 0 1 1 1v3'/%3E%3Cpath d='M12 12V8'/%3E%3C/svg%3E"
/>
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读取 localStorage["sql2er-theme"]，无记录则跟随系统偏好；
未设置 data-theme 时 CSS 兜底跟随系统（noscript 亦然）。 -->
<script>
(function () {
try {
var t = localStorage.getItem("sql2er-theme");
if (t !== "light" && t !== "dark") {
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window.matchMedia("(prefers-color-scheme: dark)").matches
? "dark"
: "light";
}
document.documentElement.setAttribute("data-theme", t);
} catch (e) {
/* localStorage 不可用时按系统偏好走 CSS 兜底 */
}
})();
</script>
<!-- 先字体，后 base -->
<link rel="stylesheet" href="./assets/fonts/fonts.css" />
<link rel="stylesheet" href="./assets/base.css" />
<link rel="stylesheet" href="./css/landing.css" />
<noscript>
<style>
.scroll-reveal {
opacity: 1;
transform: none;
}
</style>
</noscript>
</head>
<body>
<!-- NAV -->
<nav class="nav" id="nav" aria-label="主导航" data-i18n-aria="aria_nav">
<div class="nav-row">
<a href="#" class="brand" aria-label="SQL to ER diagram">
<span class="brand-mark" aria-hidden="true">
<svg
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2.2"
stroke-linecap="round"
stroke-linejoin="round"
>
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<path d="M12 12V8" />
</svg>
</span>
<span class="brand-name">SQL to ER diagram</span>
</a>
<div class="nav-links">
<a href="#features" data-i18n="nav_features">特性</a>
<a href="#demo" data-i18n="nav_demo">示例</a>
<a href="#how" data-i18n="nav_how">用法</a>
<a href="#faq" data-i18n="nav_faq">FAQ</a>
</div>
<div class="nav-actions">
<button
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id="langBtn"
aria-label="切换语言"
data-i18n-aria="aria_lang"
>
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font-family: var(--font-heading);
font-size: 0.76rem;
font-weight: 600;
"
>EN</span
>
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aria-label="切换主题"
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</svg>
</button>
<a
class="icon-btn"
href="https://github.com/ystemsrx/sql_to_ER"
target="_blank"
rel="noopener"
aria-label="GitHub"
>
<svg viewBox="0 0 24 24" fill="currentColor">
<path
d="M12 0C5.37 0 0 5.37 0 12c0 5.3 3.44 9.8 8.2 11.39.6.11.82-.26.82-.58 0-.29-.01-1.04-.02-2.05-3.34.72-4.04-1.61-4.04-1.61-.55-1.39-1.34-1.76-1.34-1.76-1.09-.74.08-.73.08-.73 1.2.09 1.84 1.24 1.84 1.24 1.07 1.83 2.81 1.3 3.5 1 .11-.78.42-1.3.76-1.6-2.67-.3-5.47-1.33-5.47-5.93 0-1.31.47-2.38 1.24-3.22-.12-.3-.54-1.52.12-3.17 0 0 1.01-.32 3.3 1.23a11.5 11.5 0 0 1 6 0c2.29-1.55 3.3-1.23 3.3-1.23.66 1.65.24 2.87.12 3.17.77.84 1.23 1.91 1.23 3.22 0 4.61-2.8 5.62-5.48 5.92.43.37.82 1.1.82 2.22 0 1.61-.01 2.9-.01 3.3 0 .32.22.7.83.58A12 12 0 0 0 24 12c0-6.63-5.37-12-12-12z"
/>
</svg>
</a>
</div>
</div>
</nav>
<!-- HERO -->
<header class="hero">
<div class="hero-grid">
<div>
<span class="eyebrow"
><span data-i18n="badge">Open source · Pure front-end</span></span
>
<h1 class="display hero-title">
<span data-i18n="hero1">把 SQL 建表语句，</span>
<span class="line-2" data-i18n-html="hero2"
>一键<em>翻译</em>成 ER 图</span
>
</h1>
<p class="hero-lead" data-i18n="lead">
基于 Chen 模型的在线 SQL / DBML
转换器。所有解析都在你的浏览器里发生，不上传、不登录、不计费。
</p>
<div class="hero-cta">
<a class="btn btn-primary" href="sql2er.html">
<svg
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="5 12 19 12" />
<polyline points="12 5 19 12 12 19" />
</svg>
<span data-i18n="cta1">打开生成器</span>
</a>
<a
class="btn btn-ghost"
href="https://github.com/ystemsrx/sql_to_ER"
target="_blank"
rel="noopener"
>
<svg viewBox="0 0 24 24" fill="currentColor">
<path
d="M12 0C5.37 0 0 5.37 0 12c0 5.3 3.44 9.8 8.2 11.39.6.11.82-.26.82-.58 0-.29-.01-1.04-.02-2.05-3.34.72-4.04-1.61-4.04-1.61-.55-1.39-1.34-1.76-1.34-1.76-1.09-.74.08-.73.08-.73 1.2.09 1.84 1.24 1.84 1.24 1.07 1.83 2.81 1.3 3.5 1 .11-.78.42-1.3.76-1.6-2.67-.3-5.47-1.33-5.47-5.93 0-1.31.47-2.38 1.24-3.22-.12-.3-.54-1.52.12-3.17 0 0 1.01-.32 3.3 1.23a11.5 11.5 0 0 1 6 0c2.29-1.55 3.3-1.23 3.3-1.23.66 1.65.24 2.87.12 3.17.77.84 1.23 1.91 1.23 3.22 0 4.61-2.8 5.62-5.48 5.92.43.37.82 1.1.82 2.22 0 1.61-.01 2.9-.01 3.3 0 .32.22.7.83.58A12 12 0 0 0 24 12c0-6.63-5.37-12-12-12z"
/>
</svg>
<span data-i18n="cta2">Star on GitHub</span>
</a>
</div>
</div>
<!-- 真实 ER 图（G6 force2 默认布局）-->
<div class="er-stage" id="erStage">
<span class="er-chip" data-i18n="live">试试拖动</span>
<button
class="er-reset"
id="erReset"
aria-label="重置布局"
data-i18n-aria="aria_reset"
>
<svg viewBox="0 0 512 512" aria-hidden="true" focusable="false">
<path d="M105.1 202.6c7.7-21.8 20.2-42.3 37.8-59.8c62.5-62.5 163.8-62.5 226.3 0L386.3 160 352 160c-17.7 0-32 14.3-32 32s14.3 32 32 32l111.5 0c0 0 0 0 0 0l.4 0c17.7 0 32-14.3 32-32l0-112c0-17.7-14.3-32-32-32s-32 14.3-32 32l0 35.2L414.4 97.6c-87.5-87.5-229.3-87.5-316.8 0C73.2 122 55.6 150.7 44.8 181.4c-5.9 16.7 2.9 34.9 19.5 40.8s34.9-2.9 40.8-19.5zM39 289.3c-5 1.5-9.8 4.2-13.7 8.2c-4 4-6.7 8.8-8.1 14c-.3 1.2-.6 2.5-.8 3.8c-.3 1.7-.4 3.4-.4 5.1L16 432c0 17.7 14.3 32 32 32s32-14.3 32-32l0-35.1 17.6 17.5c0 0 0 0 0 0c87.5 87.4 229.3 87.4 316.7 0c24.4-24.4 42.1-53.1 52.9-83.8c5.9-16.7-2.9-34.9-19.5-40.8s-34.9 2.9-40.8 19.5c-7.7 21.8-20.2 42.3-37.8 59.8c-62.5 62.5-163.8 62.5-226.3 0l-.1-.1L125.6 352l34.4 0c17.7 0 32-14.3 32-32s-14.3-32-32-32L48.4 288c-1.6 0-3.2 .1-4.8 .3s-3.1 .5-4.6 1z" />
</svg>
</button>
<div id="hero-er"></div>
<div class="er-fallback" data-i18n="fallback">加载中…</div>
</div>
</div>
</header>
<!-- FEATURES -->
<section id="features">
<div class="container">
<div class="section-head scroll-reveal">
<span class="eyebrow"
><span data-i18n="f_eyebrow">Why this tool</span></span
>
<h2 data-i18n-html="f_title">轻量、<em>优雅</em>，直接能用</h2>
</div>
<div class="features">
<div class="feat scroll-reveal">
<div class="feat-num">01</div>
<div>
<h3 data-i18n="f1_t">Agent Skill 一键安装</h3>
<p data-i18n-html="f1_d">
用 <code>npx skills add ystemsrx/sql_to_er</code> 让 Agent
直接生成与审查 ER 图。
</p>
</div>
</div>
<div class="feat scroll-reveal">
<div class="feat-num">02</div>
<div>
<h3 data-i18n="f2_t">纯前端，打开即用</h3>
<p data-i18n="f2_d">
解析在你的浏览器里完成，SQL 不会被上传到任何地方。
</p>
</div>
</div>
<div class="feat scroll-reveal">
<div class="feat-num">03</div>
<div>
<h3 data-i18n="f3_t">同时支持 SQL 与 DBML</h3>
<p data-i18n="f3_d">
粘贴 CREATE TABLE 或 DBML Ref，自动识别并生成 Chen 模型。
</p>
</div>
</div>
<div class="feat scroll-reveal">
<div class="feat-num">04</div>
<div>
<h3 data-i18n="f4_t">AGPL 开源</h3>
<p data-i18n="f4_d">
代码完全开源，支持导出图片，欢迎 fork、提 issue、发 PR。
</p>
</div>
</div>
</div>
</div>
</section>
<!-- DEMO -->
<section id="demo">
<div class="container">
<div class="section-head scroll-reveal">
<span class="eyebrow"
><span data-i18n="d_eyebrow">Try it out</span></span
>
<h2 data-i18n-html="d_title">两种输入，<em>一种</em>输出</h2>
<p data-i18n="d_sub">
切换标签看看不同格式，点「复制」然后粘到生成器里。
</p>
</div>
<div class="demo-card scroll-reveal">
<div class="demo-bar">
<div class="tab-switch" id="demoTabs" data-active="sql">
<span class="tab-indicator" aria-hidden="true"></span>
<button class="tab is-active" data-tab="sql">SQL</button>
<button class="tab" data-tab="dbml">DBML</button>
</div>
<div class="demo-actions">
<button
class="mini-btn icon-btn"
id="copyBtn"
aria-label="复制"
data-i18n-aria="copy"
>
<svg
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<rect x="9" y="9" width="13" height="13" rx="2" />
<path
d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"
/>
</svg>
</button>
<a
class="mini-btn"
href="sql2er.html"
style="
color: var(--color-accent-warm);
border-color: color-mix(
in srgb,
var(--color-accent-orange) 35%,
transparent
);
"
>
<svg
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polygon points="5 3 19 12 5 21 5 3" />
</svg>
<span data-i18n="try">打开生成器</span>
</a>
</div>
</div>
<div class="code-panel is-active" data-panel="sql">
<pre><code class="language-sql">CREATE TABLE users (
id INT PRIMARY KEY,
username VARCHAR(255) NOT NULL,
email VARCHAR(255) UNIQUE
);
CREATE TABLE posts (
id INT PRIMARY KEY,
author_id INT,
title VARCHAR(255),
FOREIGN KEY (author_id) REFERENCES users(id)
);</code></pre>
</div>
<div class="code-panel" data-panel="dbml">
<pre><code class="language-dbml">Table users {
id INT [pk]
username VARCHAR(255) [not null]
email VARCHAR(255) [unique]
}
Table posts {
id INT [pk]
author_id INT
title VARCHAR(255)
}
Ref: posts.author_id > users.id</code></pre>
</div>
<div class="demo-foot">
<svg
width="16"
height="16"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
style="color: var(--color-accent-warm); flex-shrink: 0"
>
<circle cx="12" cy="12" r="10" />
<path d="M12 16v-4M12 8h.01" />
</svg>
<span data-i18n="d_hint"
>粘到生成器左侧，点「生成 ER 图」即可。</span
>
</div>
</div>
</div>
</section>
<!-- HOW -->
<section id="how">
<div class="container">
<div class="section-head scroll-reveal">
<span class="eyebrow"
><span data-i18n="h_eyebrow">How it works</span></span
>
<h2 data-i18n-html="h_title">从粘贴到完成，<em>五步</em>以内</h2>
<p data-i18n-html="h_sub">
或者安装 Agent Skill：
<code>npx skills add ystemsrx/sql_to_er</code>
</p>
</div>
<div class="steps scroll-reveal">
<div class="step">
<div class="step-num">i.</div>
<h4 data-i18n="s1_t">打开生成器</h4>
<p data-i18n="s1_d">在线使用，或本地运行 Vite 开发服务器。</p>
</div>
<div class="step">
<div class="step-num">ii.</div>
<h4 data-i18n="s2_t">粘贴代码</h4>
<p data-i18n="s2_d">SQL 或 DBML 都行，编辑器带语法高亮。</p>
</div>
<div class="step">
<div class="step-num">iii.</div>
<h4 data-i18n="s3_t">生成图</h4>
<p data-i18n="s3_d">右侧立刻出现 Chen 模型可视化。</p>
</div>
<div class="step">
<div class="step-num">iv.</div>
<h4 data-i18n="s4_t">手动微调</h4>
<p data-i18n="s4_d">拖节点、双击改名、滚轮缩放。</p>
</div>
<div class="step">
<div class="step-num">v.</div>
<h4 data-i18n="s5_t">智能调整</h4>
<p data-i18n="s5_d">复杂图形一键整理，几秒排整齐。</p>
</div>
</div>
<div class="callout scroll-reveal">
<strong><span data-i18n="warn_t">本地运行提示：</span></strong>
<span data-i18n="warn_d"
>不能直接双击 sql2er.html。请执行
</span>
<code>pnpm dev</code>
<span data-i18n="warn_d2">，再访问 Vite 输出的 /sql2er.html 地址。</span>
</div>
</div>
</section>
<!-- CHEN -->
<section id="chen">
<div class="container">
<div class="section-head scroll-reveal">
<span class="eyebrow"
><span data-i18n="c_eyebrow">Shape semantics</span></span
>
<h2 data-i18n-html="c_title">Chen 模型<em>四件套</em></h2>
</div>
<div class="chen-grid">
<div class="chen-card scroll-reveal">
<div class="chen-shape">
<svg width="88" height="48" viewBox="0 0 88 48">
<rect
x="5"
y="5"
width="78"
height="38"
rx="3"
fill="none"
stroke="currentColor"
stroke-width="1.6"
/>
</svg>
</div>
<h4><em>i.</em> <span data-i18n="c1_t">矩形 · 实体</span></h4>
<p data-i18n="c1_d">对应数据库中的表</p>
</div>
<div class="chen-card scroll-reveal">
<div class="chen-shape">
<svg width="88" height="48" viewBox="0 0 88 48">
<polygon
points="44,4 84,24 44,44 4,24"
fill="none"
stroke="currentColor"
stroke-width="1.6"
/>
</svg>
</div>
<h4><em>ii.</em> <span data-i18n="c2_t">菱形 · 关系</span></h4>
<p data-i18n="c2_d">对应表之间的外键关系</p>
</div>
<div class="chen-card scroll-reveal">
<div class="chen-shape">
<svg width="88" height="48" viewBox="0 0 88 48">
<ellipse
cx="44"
cy="24"
rx="38"
ry="19"
fill="none"
stroke="currentColor"
stroke-width="1.6"
/>
</svg>
</div>
<h4><em>iii.</em> <span data-i18n="c3_t">椭圆 · 属性</span></h4>
<p data-i18n="c3_d">对应表中的列</p>
</div>
<div class="chen-card scroll-reveal">
<div class="chen-shape">
<svg width="88" height="48" viewBox="0 0 88 48">
<ellipse
cx="44"
cy="21"
rx="30"
ry="14"
fill="none"
stroke="currentColor"
stroke-width="1.6"
/>
<text
x="44"
y="25"
text-anchor="middle"
fill="currentColor"
font-size="11"
font-family="serif"
font-style="italic"
text-decoration="underline"
>
id
</text>
<line
x1="34"
y1="42"
x2="54"
y2="42"
stroke="currentColor"
stroke-width="1.6"
/>
</svg>
</div>
<h4><em>iv.</em> <span data-i18n="c4_t">下划线 · 主键</span></h4>
<p data-i18n="c4_d">标识该属性为主键</p>
</div>
</div>
</div>
</section>
<!-- GALLERY（简化：一张图）-->
<section id="gallery">
<div class="container" style="max-width: 860px">
<div class="section-head scroll-reveal">
<span class="eyebrow"
><span data-i18n="g_eyebrow">Showcase</span></span
>
<h2 data-i18n-html="g_title">真实输出<em>长这样</em></h2>
</div>
<figure class="fig scroll-reveal" data-lightbox>
<img
src="./assets/eg1.png"
width="2721"
height="1244"
alt="sql2er 生成的 Chen 模型 ER 图示例：实体矩形、关系菱形与属性椭圆经智能调整后整齐排布"
data-i18n-alt="g_alt"
loading="lazy"
/>
<figcaption>
<span data-i18n="g_cap">一键「智能调整」后的整洁 ER 图</span>
<span class="tag">eg.</span>
</figcaption>
</figure>
</div>
</section>
<!-- FAQ -->
<section id="faq">
<div class="container">
<div
class="section-head scroll-reveal"
style="text-align: center; margin-inline: auto"
>
<span class="eyebrow" style="justify-content: center"
><span>Questions</span></span
>
<h2 data-i18n-html="q_title">你可能想知道的<em>几件事</em></h2>
</div>
<div class="faq">
<details class="scroll-reveal">
<summary data-i18n="q1">数据会上传到服务器吗？</summary>
<div class="faq-wrap">
<div class="faq-body">
<p data-i18n="a1">
不会。工具完全是纯前端的，所有 SQL
解析都在你的浏览器里完成。没有后端、没有日志，你粘贴的代码永远不会离开这个页面。
</p>
</div>
</div>
</details>
<details class="scroll-reveal">
<summary data-i18n="q2">和标准 Chen 模型有什么差别？</summary>
<div class="faq-wrap">
<div class="faq-body">
<p data-i18n="a2">
为了自动化，工具默认用外键字段名作为菱形的标签，用表名 /
列名作为实体 / 属性。学术作业请双击图形改名，或改源 SQL
再重新生成。
</p>
</div>
</div>
</details>
<details class="scroll-reveal">
<summary data-i18n="q3">我双击 sql2er.html 打不开？</summary>
<div class="faq-wrap">
<div class="faq-body">
<p data-i18n-html="a3_html">
源码需要 Vite 编译 TypeScript 并解析前端依赖。请执行
<code>pnpm install && pnpm dev</code>，然后访问 Vite 输出的
<code>/sql2er.html</code> 地址。静态部署请先
<code>pnpm build</code>，再服务 <code>dist/</code>。
</p>
</div>
</div>
</details>
<details class="scroll-reveal">
<summary data-i18n="q4">支持哪些 SQL 方言？</summary>
<div class="faq-wrap">
<div class="faq-body">
<p data-i18n="a4">
解析以 PostgreSQL 方言为主，同时兼容常见的 MySQL / SQLite
CREATE TABLE 语法。外键无论写在列里还是尾部约束里都能识别。
</p>
</div>
</div>
</details>