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What is Markdown?

Markdown is a lightweight markup syntax that uses plain-text conventions — asterisks, hashes and brackets — to indicate formatting, and converts to HTML. It was introduced by John Gruber in 2004.

Primary sources

Specifications cited by the tools below whose own titles define Markdown.

16 tools that work with Markdown

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Text Tools8

ASCII Table FormatterTurn CSV or tab-separated text into an aligned plain-text, Markdown or box-drawing table.Checklist to MarkdownTurn a plain list into Markdown task lists, HTML checkboxes or a numbered outline.Markdown Editor & ViewerWrite markdown with a live preview, outline, formatting toolbar and one-click HTML, PDF or .md export.Markdown to DOCX ConverterExport Markdown as a DOCX with Word heading styles, lists and grid tables.Markdown to JSON ConverterParse Markdown into a structured JSON document tree with headings, lists and tables.Markdown to Plain TextStrip Markdown formatting down to clean, readable plain text.Markdown to Presentation SlidesTurn a Markdown outline into a real PowerPoint deck — one slide per heading.Markdown to Word ConverterConvert Markdown into a real, editable Word (.docx) document with proper heading styles.

Data & Format Tools3

CSV to Markdown TableTurn CSV, TSV or pasted spreadsheet data into a Markdown, HTML or reStructuredText table.Markdown FormatterTidy Markdown — normalise headings, lists, tables and emphasis markers.Markdown to HTML ConverterConvert Markdown to clean HTML, or turn existing HTML back into Markdown.

PDF Tools2

Markdown to PDFTurn Markdown into a properly typeset PDF with real headings, lists, tables and code blocks.PDF to Markdown ConverterConvert a PDF into Markdown with proper headings and pipe tables.

SEO Tools1

llms.txt GeneratorBuild a valid llms.txt: a curated, Markdown map of your site written for a model with a limited context window.

Samples & Mock Data1

Sample Markdown GeneratorGenerate Markdown documents exercising every feature — tables, code, footnotes, task lists and more.

AI & LLM Tools1

Chat Export FormatterDrop in an exported conversations file and get clean Markdown, HTML or plain text — one document per conversation.

Related terms

Terms that appear alongside Markdown on the same tools.

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