Markdown HTML Converter

Online Markdown HTML Converter

This Markdown HTML converter supports two-way conversion between Markdown and HTML, helping you organize documents, migrate web content, and prepare material for publication. Choose a conversion direction, enter content or import a file, then review the result, preview the content, and download it in the required format.

Markdown to HTML

Convert Markdown content into HTML, including headings, paragraphs, lists, blockquotes, code blocks, and other common syntax supported by the parser. The converted HTML is sanitized before being displayed and previewed. Review the output before publishing content that uses special extensions or complex syntax.

HTML to Markdown

Convert HTML into Markdown for organizing web content into notes, technical documentation, or text files managed with version control. HTML is sanitized before conversion. Complex layouts, CSS styling, interactive components, and some special tags may not be fully preserved.

Live Conversion and Result Preview

The conversion result updates automatically as you enter content, with debouncing to reduce repeated processing during continuous typing. The result area provides text output and preview views so you can inspect the content structure. The preview uses an isolated sandboxed iframe and sanitized HTML. Non-data URL images are removed from the preview, so the displayed result may differ from the original webpage.

File Import

The tool supports importing .md, .markdown, .html, and .htm files. The imported content is processed according to the currently selected conversion direction. File reading and conversion take place in your browser, without uploading files to the application server. Files may fail to load or convert because of their format, encoding, size, or content.

Copying and Downloading Files

After conversion, you can copy the result or download it as a file. For Markdown-to-HTML conversion, you can download either a complete HTML document or an HTML fragment. For HTML-to-Markdown conversion, you can download a Markdown file. Download options adjust to the selected conversion direction. A complete HTML document is suitable for standalone storage or further editing, while an HTML fragment can be inserted into an existing page or content management system.

HTML Sanitization

The conversion workflow uses HTML sanitization rules to reduce the risk of scripts, event attributes, and other potentially dangerous markup entering the output or preview. Sanitization may remove certain tags, attributes, or content, and images and links may be affected by the rules. Sanitization does not replace security validation by your target website. Review the final output before publishing.

How to Use the Tool

1. Select Markdown to HTML or HTML to Markdown.
2. Paste content into the input area or import a supported file.
3. Review the conversion result and switch to the preview view to inspect the content structure.
4. Copy the result or download a Markdown file, complete HTML document, or HTML fragment as needed.
5. If the result differs from the original, check the source syntax, file encoding, and any changes caused by sanitization.

Use Cases

• Convert Markdown notes into HTML for websites and documentation systems.
• Turn HTML content into Markdown for easier editing and version control.
• Migrate text content between blogs, technical documentation, and content management systems.
• Preview converted HTML structures and export files for further editing.
• Check content that may be sanitized or not fully preserved before publication.

Features and Limitations

This tool focuses on text-format conversion between Markdown and HTML. It is not a complete webpage copier, CSS converter, or HTML validator. Results depend on the parser, conversion rules, and input content. Complex styling, interactive behavior, special syntax, and some media content may require manual adjustments. Review important content after downloading it.

Privacy

File reading, format conversion, and preview rendering take place locally in your browser. Files do not need to be uploaded to the application server. Browser extensions, your device environment, and content that you independently copy or share are outside the scope of this tool's processing.