Markdown Parser

GFM (GitHub Flavored Markdown) is a dialect of Markdown used by GitHub. It extends standard Markdown with features like tables, task lists, strikethrough text, and autolinks.

The parser renders fenced code blocks. For full syntax highlighting with colors, you can combine it with a CSS stylesheet that styles code elements.

Yes! Write your Markdown in the editor, copy the rendered HTML, and use it in your documentation, blog, or website.

Original Markdown (2004) left many edge cases undefined, so implementations diverged. CommonMark is the rigorous specification that resolves them; GFM (GitHub Flavored Markdown) is CommonMark plus extensions: tables, task lists, strikethrough, autolinks, and a disallowed-raw-HTML filter. This tool renders GFM, matching what you see on GitHub.

Wrap inline code in single backticks. Fenced blocks use triple backticks with a language tag for syntax highlighting - like ```python on the opening line - or indent every line by four spaces (the older syntax, which interacts badly inside lists). Triple tildes also work as a fence when your code itself contains backticks.

Yes - inline HTML tags pass through to the output. GFM's disallowed-raw-HTML extension only strips a few dangerous tags (script, style, iframe and friends) when the filter is enabled. Two caveats: block-level HTML envelopes content where Markdown syntax stops being processed inside (blank lines matter), and any user-submitted Markdown must be sanitized against XSS beyond a tag filter.

Pipe-separated rows with a delimiter line of hyphens under the header. Colons set alignment: colon-dash on the left is left (the default), colons on both ends center, dash-colon right. Cells cannot contain block elements; escape a literal pipe as \|; and the outer pipes on each row are optional. More complex layouts need raw HTML or a docs engine.

The usual suspects: inconsistent indentation (nested items typically need alignment with the first character of the parent item's content), a missing blank line between a paragraph and a list, or tabs mixed with spaces. CommonMark specifies exact rules for all of these. Converting tabs to spaces and adding blank lines around lists fixes the vast majority of nesting bugs.