Markdown HTML Converter

📖 Tool Introduction

Convert between Markdown and HTML in either direction, covering the syntax people actually use: headings, lists, links, images, inline code, bold and italic, strikethrough, block quotes and horizontal rules.

The two directions come up for different reasons and both are common. Writing happens in Markdown because it is faster and reads well in a plain editor, but publishing usually needs HTML. Going the other way is what you do when an old article or a page handed over by someone else arrives as markup and needs to become editable text again. Doing either by hand is slow, and it is the kind of work where one missed tag produces something that looks finished and renders wrongly.

In the Markdown to HTML direction, inline syntax is resolved before block syntax, and the order is deliberate. Special characters are escaped first, then code spans, then images, then links, then emphasis. Resolving code before emphasis matters because a backtick span should come out literally rather than having its contents reinterpreted, and handling links before emphasis keeps a URL from being mangled by the bold and italic passes.

The HTML to Markdown direction replaces tags by level: a heading becomes as many hash marks as its depth, links and images become the bracket syntax, list items become hyphens, and quotes get their marker. Runs of blank lines are folded afterwards, because tag removal tends to leave gaps behind that no editing tool wants.

Both directions report the input and output size, which is a quick sanity check on whether anything was dropped. Everything runs in the browser, so what you paste never leaves your device.

One caveat is worth stating plainly, which is that Markdown has dialects. This covers the syntax common to nearly all of them, and that is the part ordinary documents are made of, but it does not implement the extensions particular platforms add, such as task list checkboxes, footnotes or table alignment markers. Text using those still converts; the extended parts simply come through as literal characters rather than as structure, which is the honest outcome rather than a silent corruption.

✨ Key Features

• Both directions: Markdown to HTML, and HTML back to Markdown
• Headings at all six levels, plus lists
• Links, images, inline code, bold, italic and strikethrough
• Block quotes and horizontal rules
• Inline syntax resolved first, so special characters inside links survive
• Runs locally: nothing is uploaded

🚀 How to Use

1. Paste Markdown or HTML on the left
2. Pick the direction on the right
3. Press process, or use Ctrl plus Enter
4. The result box shows the converted content
5. Copy result puts it on your clipboard

⚠️ Things to Note

• Data source: Based on the correspondence between common Markdown syntax and HTML tags; conversion runs in the browser
• Complex tables are limited: Tables and deeply nested lists are covered for the usual forms; unusual nesting may need a small adjustment afterwards
• Code blocks: Multi-line blocks are handled as inline code spans, so fenced blocks are best converted on their own
• Attributes are dropped: Class, style and other attributes in the HTML do not survive the trip into Markdown
• Privacy: Everything runs in the browser. What you paste is never sent to a server