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HTML预览器

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📖 HTML预览使用指南

操作步骤
1
编写HTML代码

在左侧编辑器中EnterHTML标签和内容

HTML编辑区
2
查看实时预览

右侧区域实时显示渲染效果

预览区域
3
添加CSS/JS

可切换添加样式和脚本代码

CSS/JS标签
4
Copy代码

点击Copy完整代码

Copy按钮
💡 支持CSS和JavaScript可实时调试
使用场景
💻 前端调试

快速测试HTML/CSS代码效果

📧 邮件模板

编辑HTML邮件模板时实时看效果

📚 学习HTML

学HTML时边写代码边看效果

左边写代码，右边实时看效果，支持多种Example模板

💻 HTML代码
👁️ 预览效果

What is HTML Preview?

HTML Preview shows real-time rendering of HTML code. Input HTML snippets and see results instantly. Great for email template debugging, code snippet viewing.

How to Use HTML Preview?

  1. Enter HTML code on the left
  2. View rendered result on the right
  3. Support fullscreen preview and viewport adjustment

Common Use Cases

Why Choose JieBang HTML Preview?

Related Tools

JSON Formatter

Format & validate JSON

 Base64 Encoder

Encode & decode Base64

 URL Encoder

Encode & decode URLs

 Word Counter

Count words & chars

Frequently Asked Questions

What is a regex tester?

A regex tester lets you write and test regular expressions against sample text in real-time, highlighting matches as you type.

How to test an API endpoint?

Enter the URL, select HTTP method (GET/POST/PUT/DELETE), add headers and body, then click Send. JieBang's API Tester shows the response instantly.

Are developer tools free?

Yes, all JieBang developer tools are 100% free — JSON formatter, Base64 encoder, regex tester, API tester, cron validator, and more.

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意见反馈

\n' }; function updatePreview() { var code = document.getElementById('html-editor').value; var iframe = document.getElementById('html-preview'); if (!code.trim()) { iframe.srcdoc = ''; return; } iframe.srcdoc = code; } function loadExample(type) { if (examples[type]) { document.getElementById('html-editor').value = examples[type]; updatePreview(); showToast('Example已加载'); } } function clearEditor() { document.getElementById('html-editor').value = ''; document.getElementById('html-preview').srcdoc = ''; showToast('已Clear'); } function copyToClipboard(text) { if (navigator.clipboard && navigator.clipboard.writeText) { navigator.clipboard.writeText(text).then(function() { showToast('已Copy到剪贴板'); }).catch(function() { fallbackCopy(text); }); } else { fallbackCopy(text); } } function fallbackCopy(text) { var textarea = document.createElement('textarea'); textarea.value = text; textarea.style.position = 'fixed'; textarea.style.opacity = '0'; document.body.appendChild(textarea); textarea.select(); try { document.execCommand('copy'); showToast('已Copy到剪贴板'); } catch (e) { showToast('Copy失败'); } document.body.removeChild(textarea); } function showToast(msg) { var e = document.querySelector('.toast'); if (e) e.remove(); var t = document.createElement('div'); t.className = 'toast'; t.textContent = msg; document.body.appendChild(t); setTimeout(function() { t.classList.add('show'); }, 10); setTimeout(function() { t.classList.remove('show'); setTimeout(function() { t.remove(); }, 300); }, 2000); } document.getElementById('html-editor').addEventListener('input', function() { clearTimeout(debounceTimer); debounceTimer = setTimeout(updatePreview, 300); });

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