UlvixorMarkdown to HTML Converter
Write or paste your Markdown text and get the equivalent HTML code instantly, along with a preview of how it would render. Everything runs in your browser, so your content is never uploaded to a server.
How it works
- Write or paste your Markdown text into the input panel (or use the built-in example).
- The tool converts the Markdown to HTML instantly using the marked library.
- The resulting HTML code appears as text in the output panel, ready to copy.
- In the 'Preview' tab you can see how that HTML would render, inside an isolated iframe with no scripts.
- Copy the generated HTML or download it as an .html file.
Use cases
- Convert a README or Markdown document to HTML to paste into a CMS or newsletter.
- Generate the HTML for an article written in Markdown before publishing it to a blog.
- Quickly preview how a Markdown text would look before uploading it to GitHub or GitLab.
- Include Markdown-authored content inside an HTML email template.
Use cases
- Convert a README or Markdown document to HTML to paste into a CMS or newsletter.
- Generate the HTML for an article written in Markdown before publishing it to a blog.
- Quickly preview how a Markdown text would look before uploading it to GitHub or GitLab.
- Include Markdown-authored content inside an HTML email template.
Common mistakes
- Pasting Markdown with single line breaks expecting them not to create a visual break.The tool has the 'breaks' option enabled (GitHub Flavored Markdown), so a single line break already produces a <br>. If you don't want that, leave a blank line between paragraphs.
- Relying on the preview to test whether a <script> embedded in the Markdown actually runs.The preview renders inside an isolated (sandboxed) iframe with no permission to run JavaScript, so any embedded script won't execute there, even though it will still appear as-is in the generated HTML.
- Using extended syntax from a specific Markdown engine (like Obsidian or Notion) and expecting it to convert the same way.The tool uses standard GitHub Flavored Markdown (GFM); syntax specific to other flavors may not be recognized.
Frequently asked questions
No. Markdown-to-HTML conversion happens entirely in your browser with the marked library. Your text never leaves your device or gets uploaded anywhere.
No. The preview renders inside an isolated (sandboxed) iframe with no permission to run JavaScript, so even if your Markdown contains HTML with <script> tags, they'll never execute.
It uses GitHub Flavored Markdown (GFM), which adds tables, task lists, strikethrough text, and automatic line breaks on top of standard Markdown syntax.
Yes, the Markdown supports embedded HTML and it will be included as-is in the result. Keep in mind that if you copy that HTML to a live site, you should sanitize it if it comes from an untrusted source.
Yes, you can download the generated HTML as an .html file, ready to open in a browser or include in your project.
Alternatives
Editors like VS Code (with a Markdown preview extension) or GitHub itself show a similar conversion as you type. This tool is useful when you need the final HTML code ready to copy, not just a preview.