Apply a limited set of Markdown-like replacements for H1–H3 headings, emphasis and simple dash items. This is not a full Markdown parser and does not sanitize embedded HTML.
The Markdown to HTML tool applies a short sequence of replacements rather than implementing a complete Markdown specification. Paste a sample and select Convert to HTML to see the generated string in a separate output box. It handles selected heading markers, asterisk emphasis and simple dash-item patterns, then replaces newlines with br elements. Use it when those limited rules match the task, not as proof that any document labeled Markdown will be parsed correctly.
Keep the original source and test representative constructs before converting a long guide. A document can include links, code, nested lists and other syntax that this function does not interpret. The output may still look like HTML without representing the author's intended structure. Choose a maintained parser when the requirement is a particular Markdown dialect or predictable rendering across a publishing system. This utility is better suited to an inspectable basic fragment whose limitations are understood before integration.
A line beginning with three hash marks and a space is replaced with h3, two hash marks and a space with h2, and one hash mark and a space with h1. Those replacements run in that order using multiline matching. Leading indentation is not handled as a general heading rule, and levels four through six are not provided by this implementation. Inspect the exact marker and spacing in the source when an apparent heading remains unchanged in the output.
For “# Guide” followed by a newline and “Text”, the generated string includes an h1 for Guide and a br before Text. It does not automatically wrap the body in paragraph elements. A full page's existing main heading and the heading introduced by a converted fragment should be reviewed together during integration. The fact that a sample generates an h1 does not decide whether that level is appropriate inside a particular section of your finished document.
Double-asterisk pairs are replaced with strong elements before single-asterisk pairs are replaced with em elements. A simple “**bold** and *soft*” produces the expected basic pair of element types. The expressions are not a full delimiter parser and do not implement every escaping, nesting or multiline convention expected by richer Markdown systems. An asterisk used literally can therefore be interpreted differently from the way the author intended in a technical example or mathematical text.
Underscore-based emphasis is not separately supported. Neither are all combinations of nested strong and emphasis, code spans that should protect their contents or escaped markers. Use a small example with the exact syntax in your source and inspect the generated element boundaries. If the task requires complex inline formatting, select an appropriate parser instead of adding ad hoc source changes only until the first preview looks plausible while leaving other passages with inconsistent interpretation.
Lines beginning with a dash and a space are converted into li strings. A later expression wraps a range from a matching li opening through a matching li closing in a ul. That wrapper uses a broad match that can span intervening content between list-like lines. Separate groups can therefore be combined unexpectedly, and a heading between them can end up inside a wrapper that does not reflect the intended document structure.
Nested lists, ordered lists and task checkboxes do not receive a complete list model here. The final newline replacement can also insert br elements between generated items. Compare the literal output with valid intended list structure before using it. A pair of li tags in an output box is not evidence that all surrounding blocks have been grouped appropriately. For a substantial article with several list sections, a real block parser is the more suitable way to preserve boundaries and nesting deliberately.
After the selected replacements, CRLF, CR and LF sequences are replaced with literal br elements and the overall result is trimmed. Blank source lines can therefore become consecutive breaks, not a pair of separately wrapped paragraphs. This differs from Markdown systems that infer paragraph blocks and apply their own soft-break rules. A visually familiar source document can consequently produce a different HTML structure even when its individual headings and emphasis fragments were converted as expected.
Inspect the joins around headings and lists as well as plain body text. The function does not build a complete block tree or normalize every mixture of line endings before its earlier pattern matches. If your destination has its own Markdown processing, avoid converting once here and then processing the resulting mixed representation again without understanding that pipeline. Decide whether the receiving field expects original Markdown, trusted HTML or literal text before you copy the output into it.
Link notation, image notation, fenced code, inline backticks, tables, blockquotes and thematic rules do not have dedicated complete handlers in this function. A string may remain in its original notation, or parts of it may be affected by another simplistic replacement. Code fences, for example, do not protect a line that looks like a heading from the heading rule. This is a reason to inspect source types rather than calling every generated result an accurate conversion of full Markdown.
A requirement to preserve URLs, code samples or tables needs a suitable document parser and output policy. Do not discard unsupported syntax simply to make the sample work unless that loss is genuinely acceptable for the task. Keep the original so you can switch workflows without reconstructing it from a partial conversion. The supported examples are useful for learning these specific replacements, but they do not establish feature compatibility with CommonMark, GitHub-style Markdown or another named dialect.
The converter does not escape or sanitize existing raw HTML before applying its replacements. Angle brackets and attributes supplied in the source can remain in the output. The textarea displays them as text, but inserting that string into a live HTML context is another operation with different consequences. Use an appropriate rendering and sanitization policy for the actual application rather than assuming that a Markdown-looking input has become safe markup simply because it passed through this tool.
It also does not validate closing tags or prove that generated fragments are structurally appropriate for the destination. Review the result as code and, when needed, render a known trusted sample in an isolated test environment before deployment. That check is separate from the conversion itself. A readable preview cannot certify factual accuracy, accessibility or safe handling of arbitrary source, and the tool provides no automatic publishing or template integration that would perform those reviews on your behalf.
Select Convert to HTML again after editing the source because output is generated only on demand. Copy the checked string manually in the format the destination expects, then inspect the saved document and any resulting page structure. Keep a test sample with a heading, simple emphasis and one list when comparing behavior across implementations. If a feature is essential, verify that exact feature rather than inferring support from a successful unrelated example.
Save the original Markdown with the reviewed output so limitations and manual fixes remain visible to another editor. A later change in parser or publishing system can otherwise make it difficult to distinguish intended formatting from an artifact of these replacements. The useful outcome is a basic fragment that meets a clearly defined task. For complete Markdown documents, use a workflow whose syntax support, HTML policy and rendering checks match the actual requirements instead of treating this limited helper as a universal converter.
The function applies limited H1–H3 heading, asterisk-emphasis and dash-item replacements, then converts newlines to br elements.
No. It is a sequence of regular-expression replacements without complete block and delimiter parsing.
Not by dedicated rules in this implementation. Review the output for those source markers.
No. Newlines become br elements rather than a complete paragraph model.
There are no dedicated complete rules for those Markdown forms. Do not assume the notation becomes the intended elements.
No. Other replacements can still affect text inside an apparent fenced block.
Yes. The broad list wrapper can span content between matching li strings.
There is no separate underscore-emphasis handler. Test the exact syntax required by your task.
No. Review and apply an appropriate output policy before rendering the result as HTML.
No. Select Convert to HTML again after a change to generate a current result.