Online HTML Formatter and Minifier

Online HTML Formatting, Minification and Structure Validation

The online HTML formatter organizes, minifies and checks HTML source code. It converts compressed or poorly indented markup into a readable hierarchy and helps identify tag closing and nesting problems for frontend development, debugging and template maintenance.

HTML Formatting

HTML tags are automatically arranged with line breaks and indentation according to their nesting relationships. Choose 2 spaces, 4 spaces, 8 spaces or Tab indentation.

HTML Minification

HTML minification removes unnecessary whitespace, line breaks and indentation. Content-sensitive areas such as pre, textarea, script and style are protected to avoid changing meaningful content.

HTML Structure Validation

The tool checks basic HTML structure, including unclosed tags, mismatched closing tags and abnormal nesting, helping identify markup that may cause page structure problems.

Comments and Special Content

HTML comments can be retained or processed according to the selected option. Special areas such as pre, textarea, script and style are protected during formatting and minification.

Error Location and Result Handling

When a structural problem is detected, the tool provides an error message and code location. You can copy the result, download an HTML file or restore the result to the input area for further editing.

Common Uses

• Format compressed HTML source code for easier reading.
• Organize HTML pages and templates in frontend projects.
• Check unclosed tags and abnormal nesting.
• Minify HTML before publishing to reduce unnecessary whitespace.

Privacy and Data Security

HTML formatting, minification and structure checking are performed locally in the browser. Your source code is not uploaded to the server.