Is this tool free to use?

Yes, this tool is completely free to use. No registration, subscription, or payment is required. All processing happens directly in your browser.

Does this tool upload data to a server?

No. All processing happens locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. The tool works even when offline.

Does this tool work on mobile devices?

Yes, this tool is fully responsive and works on all modern browsers including Chrome, Safari, Firefox, and Edge on desktop, tablet, and mobile devices.

Is an internet connection required to use this tool?

No internet connection is required after the page loads. Since all processing happens in your browser, you can use this tool offline once the page is loaded.

Is there a file size limit?

There is no server-side file size limit since files are processed locally in your browser. The only limitation is your device's memory (RAM). For very large files, we recommend processing them in smaller chunks.

✨ HTML Beautifier

Free online HTML beautifier and formatter. Automatically indent and format messy HTML code. Customize indent size with real-time preview. One-click copy formatted code. Client-side only, no data stored.

Indent Size

Input HTML

Output

How to Use the HTML Beautifier

Using the HTML Beautifier is simple. Follow these three steps:

Enter Your Code or Data
Type, paste, or upload the html beautifier content into the input area. The tool supports direct text input, file upload, and drag-and-drop. All processing happens entirely in your browser.
Configure Formatting Options
Select your preferred formatting options such as indentation size, sorting preferences, or minification mode. Click the "Format", "Beautify", or "Minify" button to process your content instantly.
Copy or Download the Result
The formatted result appears immediately in the output area. Use the "Copy" button to copy to your clipboard, or "Download" to save as a file. The original content is never uploaded to any server.

FAQ

HTML格式化安全吗？代码会泄露吗？

完全安全。本工具在浏览器本地运行，你的HTML代码不会被发送到任何服务器。格式化处理完全在本地JavaScript中完成，保护你的代码隐私。

支持哪些代码格式化？

本工具主要针对HTML代码进行格式化，同时也支持嵌入在HTML中的CSS和JavaScript代码的缩进处理。支持自定义缩进大小（2空格、4空格或Tab）。

格式化后代码无法正常工作怎么办？

本工具只调整代码的缩进和换行格式，不会修改代码的逻辑和内容。如果格式化后出现问题，通常是原始代码存在未闭合标签或语法错误。建议先验证HTML的合法性。

最大支持多大的HTML文件？

建议单次格式化不超过1MB的HTML代码。过大的文件可能导致浏览器响应变慢。如果需要处理大型文件，建议分块格式化。