Which Markdown flavor does this support?

CommonMark plus GitHub Flavored Markdown (GFM) — which is the dialect most of the modern web has converged on. That gives you tables with pipes, fenced code blocks with language hints (```js), autolinks (paste a URL and it linkifies), strikethrough (~~text~~), and task lists (- [x] done). What's not included: MultiMarkdown footnotes, Pandoc-style attributes, custom directives. If your source relies on those, you'll need a flavor-specific renderer.

Why isn't my HTML→Markdown perfect?

Because HTML can express things Markdown literally cannot — multi-column layouts, arbitrary inline styles, custom components, anything CSS-driven. The HTML-to-Markdown direction handles the structural stuff cleanly (headings, bold, italic, code, lists, blockquotes, links, images), but custom divs, classes, and visual styling get stripped. That's the right behaviour — Markdown is structural, not presentational. If you need every CSS class preserved through the round-trip, you needed HTML in the first place.

Is the rendered HTML safe to embed?

Not by default — marked.js doesn't sanitize the output. If your Markdown source contains tags or onclick handlers, they pass straight through to the rendered HTML. Fine when you're writing your own content. Risky if you're rendering Markdown submitted by untrusted users — pipe the result through DOMPurify (or your framework's sanitizer) before injecting it into a live page, or you've just built an XSS vector.

Can I use this for blog drafts?

Yes — that's one of the most common workflows. Write in the Markdown pane, watch the preview update live as you type, then copy the raw HTML output (not the rendered preview) and paste into your CMS. WordPress block editor, Ghost, and Webflow CMS all accept HTML paste cleanly; copying from the preview pane usually drags styled spans that your CMS will fight with later.

Markdown ↔ HTML Converter (2026)

Base Converter

Convert integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — built for programmers debugging memory addresses, bitmasks, and hex colors.

Unix Timestamp Converter

Translate Unix epoch timestamps (seconds or milliseconds since Jan 1 1970 UTC) to readable ISO, UTC, and local-timezone dates — auto-detects format and handles the Y2038 problem.

Color Converter

Translate colors between HEX, RGB, and HSL with a live swatch preview — built for CSS work, brand palette design, and converting Tailwind shades between formats.

Word Counter

Live word, character, sentence, and paragraph counter with reading and speaking time estimates — ideal for essays, blog SEO, tweets within 280 chars, and timed speeches.

Case Converter

Instantly convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case — ideal for variable renaming, URL slugs, and headings.

Password Generator

Generate cryptographically secure random passwords (6 to 64 chars) using the browser's Web Crypto API, with strength meter and optional uppercase, digits, and symbol character sets.

Text Reverser / Palindrome Checker

Reverse any text character-by-character or word-by-word, plus check classic palindromes like "A man, a plan, a canal: Panama" while ignoring spaces, punctuation, and case.

QR Code Generator

Create QR codes from URLs, text, Wi-Fi, contact cards, email, phone, SMS, and locations. Free PNG and SVG download.

Premium Converters

Premium Converters

Markdown ↔ HTML Converter