Which Markdown flavour does brevio support?

GFM (GitHub Flavored Markdown) — which is CommonMark plus tables, task lists, strikethrough, and fenced code blocks with language hints. This is the most widely used Markdown variant across developer tools, CMSs, and documentation platforms.

Why does my Markdown not convert line breaks correctly?

In CommonMark/GFM, a single line break in source is not a in the HTML output — it is treated as a space (paragraph continuation). To force a line break, add two spaces at the end of the line before pressing Enter, or leave a blank line to start a new paragraph. Different Markdown parsers handle this differently.

Can I convert Markdown to HTML from the command line?

Yes. Pandoc is the most powerful option: `pandoc input.md -o output.html` for a fragment or `pandoc input.md -s -o output.html` for a full standalone HTML file with head/body tags. Install via Homebrew (`brew install pandoc`). Runs entirely locally.

Is Markdown-to-HTML conversion reversible?

Not cleanly. HTML-to-Markdown conversion is an approximation — HTML has semantics (classes, attributes, nested structures) that Markdown cannot represent. Tools like Turndown.js can convert basic HTML back to Markdown, but complex HTML loses fidelity. Keep your source in Markdown.

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How to Convert Markdown to HTML (In-Browser, No Upload)

Last updated: 11 June 2026

You can convert Markdown to HTML entirely in your browser using brevio Markdown to HTML — the conversion runs in JavaScript locally using a Markdown parser. No content is uploaded.

Markdown-to-HTML conversion is a pure text transformation. There is no reason it needs a server — Markdown parsers are small JavaScript libraries that run efficiently in the browser. For content that includes API documentation, internal notes, or anything proprietary, keeping the conversion local is a straightforward privacy win.

How to Convert Markdown to HTML Without Uploading

Open brevio Markdown to HTML. No account required.
Paste your Markdown. The conversion renders in real-time as you type — no button press needed. Nothing is transmitted.
Copy the HTML output. The clean HTML is ready to paste into your CMS, email template, or static site generator.
Optionally preview the rendered output. Toggle between the raw HTML and the rendered preview to verify formatting before using.

How to Verify No Upload Occurs

Open DevTools → Network tab. Paste Markdown content and watch for requests. Only initial JS/CSS loads should appear — no request should fire in response to your text input. This confirms the conversion is local.

Markdown Flavours and What They Affect

There is no single Markdown standard. Parsers implement different extensions, which means the same Markdown input can produce different HTML output:

Flavour	Extra Features	Common In
CommonMark	Standardised spec, no extras	Basis for most parsers
GitHub Flavored Markdown (GFM)	Tables, task lists, strikethrough, fenced code blocks with language	GitHub, GitLab, many dev tools
Pandoc Markdown	Footnotes, citations, definition lists, math (LaTeX), divs	Academic writing, document conversion
MultiMarkdown	Tables, footnotes, metadata headers, cross-references	macOS writing apps

Common Markdown Conversion Issues

Line breaks: In CommonMark, a single line break in the source is not a <br> in output — you need two spaces at the end of a line, or a blank line between paragraphs. GFM treats single newlines as <br> in some contexts.
Nested lists: Indentation rules vary by parser. CommonMark requires 4 spaces (or 1 tab) for nesting. GFM accepts 2 or 4 spaces. Inconsistent indentation causes rendering differences.
HTML in Markdown: Most parsers allow inline HTML. Some sanitise it (for security). If your target renderer sanitises HTML, raw HTML blocks in your Markdown may be stripped.
Code fence language hints: ```js adds a language-js class to the output <code> element for syntax highlighters. The parser itself doesn't highlight — syntax highlighting is a separate client-side library (Prism, highlight.js).

Markdown to HTML Converter Comparison

Tool	Upload?	Flavour	Preview?	Works Offline?
brevio Markdown to HTML	No — in-browser	GFM (CommonMark + tables)	Yes	Yes (once loaded)
Dillinger.io	No — in-browser	GFM	Yes (live split)	No
Markdowntohtml.com	Yes — server-side	Standard	Limited	No
Pandoc (CLI)	No — local	Pandoc (most features)	No	Yes
marked.js (library)	No — embed in project	GFM	N/A	Yes

Command Line Alternative (Pandoc)

# Convert Markdown file to HTML pandoc input.md -o output.html # Standalone HTML with head/body tags pandoc input.md -s -o output.html

Pandoc is the most feature-complete Markdown converter available. Install via Homebrew (brew install pandoc) or download from the Pandoc website. Runs entirely locally.

Frequently Asked Questions

Which Markdown flavour does brevio support?: GFM (GitHub Flavored Markdown) — which is CommonMark plus tables, task lists, strikethrough, and fenced code blocks with language hints. This is the most widely used Markdown variant across developer tools, CMSs, and documentation platforms.
Why does my Markdown not convert line breaks correctly?: In CommonMark/GFM, a single line break in source is not a <br> in the HTML output — it is treated as a space (paragraph continuation). To force a line break, add two spaces at the end of the line before pressing Enter, or leave a blank line to start a new paragraph. Different Markdown parsers handle this differently.
Can I convert Markdown to HTML from the command line?: Yes. Pandoc is the most powerful option: `pandoc input.md -o output.html` for a fragment or `pandoc input.md -s -o output.html` for a full standalone HTML file with head/body tags. Install via Homebrew (`brew install pandoc`). Runs entirely locally.
Is Markdown-to-HTML conversion reversible?: Not cleanly. HTML-to-Markdown conversion is an approximation — HTML has semantics (classes, attributes, nested structures) that Markdown cannot represent. Tools like Turndown.js can convert basic HTML back to Markdown, but complex HTML loses fidelity. Keep your source in Markdown.