Free Markdown to HTML Online

A markdown to html converter takes plain-text Markdown — the shorthand syntax used in README files, GitHub comments, static-site content, and countless note-taking apps — and turns it into ready-to-use HTML markup. This tool does that entirely in your browser: paste or type Markdown into the left pane, and a split-screen preview on the right updates instantly, with a toggle to switch between the rendered result and the raw HTML behind it. It covers core Markdown syntax — headers, bold and italic emphasis, links, lists, blockquotes, inline and fenced code, and basic tables — rather than implementing the full CommonMark specification, which matters if your source documents lean on more obscure syntax extensions.

How This Markdown to HTML Converter Works

The interface is a two-pane editor. Type or paste Markdown into the left textarea, labeled "Markdown Editor," and the parser re-runs on every keystroke, so the right pane never falls out of sync with what you've typed. That right pane, labeled "Result," defaults to a rendered preview showing exactly how the output would look on a page, complete with styled headers, formatted lists, and a bordered code block. A small toggle switches the same pane to "Raw HTML," which shows the literal markup tags the parser generated instead of their rendered appearance — useful when you actually need the tags themselves rather than a visual preview.

Three buttons sit above the editor. "Clear" wipes the input so you can start from a blank slate instead of manually deleting the default sample text. "Copy HTML" places the generated markup on your clipboard, ready to paste into a CMS, static-site template, or email client. "Download" saves the output as a standalone document.html file — worth noting that this download is the converted markup fragment itself, not a complete HTML5 document with a doctype, head, and body wrapper, so you'll want to drop it into an existing page template rather than opening it as a finished site on its own. A running character count in the editor's header gives you a quick sense of how much you've written without needing to select and count manually.

Why Convert Markdown to HTML

Markdown is everywhere developers write, but not every destination understands it natively. A few situations come up constantly:

• Publishing README content elsewhere. Project documentation is usually written in Markdown for GitHub or GitLab, but if you need that same content on a company blog, internal wiki, or marketing page that only accepts HTML, converting it directly avoids retyping the whole thing by hand.
• Feeding a CMS that doesn't parse Markdown. Plenty of content management systems expect raw HTML in their editor fields. Writing in Markdown first — faster to type, easier to review as plain text, easier to track changes to in version control — and converting at the very end gets you the speed of Markdown with a CMS that only accepts markup.
• Embedding formatted notes in email or documentation tools. Rich-text editors in ticketing systems, internal knowledge bases, and email clients frequently accept pasted HTML but not Markdown syntax directly, so a quick conversion step bridges the gap without reformatting everything by hand inside the destination editor.
• Checking how Markdown will actually render before committing it. Since the preview updates live as you type, it doubles as a sanity check for whether your headers, tables, or lists are structured the way you intended before you push the source file anywhere or hand it off to someone else.
• Teaching or demonstrating the relationship between Markdown and HTML. Toggling between the rendered preview and the raw HTML view is a fast way to show exactly which markup each piece of Markdown syntax produces, which is genuinely useful for anyone learning what a header or a link actually compiles down to.

What This Converter Supports — and What It Doesn't

The parser recognizes headers from a single hash mark through six, bold text wrapped in double asterisks, italics using either single asterisks or underscores, inline links, inline code spans, fenced code blocks (tagged with a language class for downstream styling, though no color syntax highlighting is applied to the code itself), blockquotes, unordered and ordered lists, simple checkbox-style task lists, and pipe-delimited tables that use a header-separator row to distinguish the header from the body. That's a genuinely useful working subset, but it stops short of full CommonMark: image syntax, horizontal rule dividers, nested lists, strikethrough text, and footnotes aren't part of what this particular parser recognizes, so any of those in your source will pass through as plain text rather than rendering as intended.

The API endpoint documented at /docs runs a separate rendering path with a different feature mix worth knowing about if you're choosing between the two: it adds support for image syntax and horizontal rules that the browser tool doesn't handle, but it collapses header depth down to two effective levels in the output (single and double hash marks both produce the same heading tag, with only a triple hash mark getting its own smaller tag) and doesn't render tables or task lists at all. Neither implementation is a full CommonMark parser — pick whichever one's specific coverage matches the syntax your source document actually uses, and each API call to that endpoint uses a single credit.

Feature	Browser Tool	API Endpoint
Header depth	H1 through H6	Two effective levels
Images	Not supported	Supported
Horizontal rules	Not supported	Supported
Tables	Supported	Not supported
Task lists	Supported	Not supported

A Few Formatting Quirks Worth Knowing

Because the browser tool's parser processes your document one physical line at a time rather than grouping lines into blocks first, a couple of behaviors are worth understanding before you paste in a long document. Ordinary lists merge correctly across consecutive lines — each list item you type on its own line joins the same surrounding list element rather than starting a new one, so a five-line bullet list renders as one cohesive list, exactly as you'd expect. Blockquotes behave differently: each line starting with a quote marker becomes its own separate blockquote element rather than merging with the quote lines above and below it, so a quotation you've wrapped across three source lines will render as three stacked blockquotes instead of a single multi-line one.

Paragraphs follow a similar per-line rule. If you've hard-wrapped a long paragraph across several lines in your text editor — a habit many writers carry over from word processors — without leaving a blank line between those wrapped lines, this parser treats each wrapped line as its own separate paragraph rather than joining them back into one. The practical fix is simple: keep a paragraph on a single unbroken line in your source (most editors will soft-wrap it visually without inserting an actual line break), or expect a hard-wrapped paragraph to render as several shorter ones. Table separator rows are read a little more loosely too — a row like colon-dash-colon is accepted as a valid header separator so the table still parses correctly, but this converter doesn't translate those alignment colons into left, right, or center column alignment in the rendered output; every cell renders with the same default alignment regardless of what the separator row specifies.

Markdown to HTML vs. Full CommonMark Libraries and Static Site Generators

Static site generators like Jekyll, Hugo, or Next.js content pipelines typically bundle a complete CommonMark-compliant Markdown library, capable of handling every syntax extension a source document might use, including footnotes, definition lists, and deeply nested structures. If you're already running one of those pipelines, it's the right tool for rendering your actual site — this browser converter isn't trying to replace that build step. Where it earns its place is the in-between moment: you have a chunk of Markdown that needs to become HTML right now, without spinning up a build tool, installing a library, or writing a script, for a one-off email, a wiki paste, or a quick check of how a snippet will render.

GitHub-flavored Markdown, which is what most developers actually write day to day, layers extras on top of the base spec — strikethrough text, automatic linking of bare URLs, and alignment-aware tables among them. This converter's table and list handling covers the common ground, but it doesn't automatically hyperlink a bare URL the way GitHub's renderer does, and there's no strikethrough syntax recognized at all, so double-tildes will simply appear as literal text in the output rather than crossed-out characters.

Command-line Markdown processors offer similar one-off conversion but require a terminal, a language runtime, and usually a package installation before the first run. For a single snippet, that setup cost outweighs the benefit — pasting into a browser tab and getting an instant result is simply faster for occasional use, even though a CLI tool would win for converting hundreds of files in a batch job.

Privacy and Processing

Everything happens locally in your browser tab. The parser is plain JavaScript running against the text you've typed — no network request carries your Markdown or the resulting HTML to a server for the free conversion tool, and nothing is saved once you close or refresh the page. That matters if you're converting anything that hasn't shipped publicly yet, like unreleased documentation or internal notes you'd rather not route through a third party.

Common Questions About Converting Markdown to HTML

Does this tool implement the full CommonMark specification?

No. It covers a practical core subset — headers, emphasis, links, lists, blockquotes, code, and tables — but doesn't handle every CommonMark extension, so unusual or advanced Markdown syntax may not convert as expected.

Can I upload a README.md file directly?

There's no file upload control on this tool; open the file in a text editor, copy its contents, and paste them into the Markdown pane instead.

Will images referenced in my Markdown appear in the preview?

Not in the browser tool — image syntax isn't part of what this parser recognizes, so an image reference will show up as literal text rather than a picture. The separate API version of this converter does render image tags, so route image-heavy content through that path instead if needed.

What happens if my Markdown has nested bullet lists?

Nested list indentation isn't preserved by this parser; every list item renders at the same flat level regardless of how it was indented in the source.

Does a blank line matter between two paragraphs?

Less than you'd expect — each physical line of plain text becomes its own paragraph in the output regardless of whether a blank line separates it from the next, so hard-wrapped prose written across multiple lines will split into multiple short paragraphs rather than merging into one.

Does the downloaded file include a complete HTML document structure?

No — the download is the converted markup fragment itself, without a doctype, head section, or body wrapper. Paste the fragment into an existing HTML template if you need a full standalone page.

Are fenced code blocks syntax-highlighted in the output?

The output tags each code block with a language class name, but no color highlighting is applied by this tool — you'd need a separate syntax-highlighting library to add that styling downstream.

Related Tools

Once you have raw HTML output, the HTML formatter can re-indent it for readability before you drop it into a template. If your Markdown source contains characters that need escaping for safe embedding elsewhere, the HTML entity encoder handles that conversion separately. Comparing two drafts of the same Markdown file before deciding which changes to keep is easier with the code diff tool, and if your documentation embeds JSON configuration samples inside fenced code blocks, running them through the JSON formatter first keeps those examples consistently indented.