Markdown (“MD”) in one line
Markdown is a lightweight, plain-text way to write formatted text.
Instead of clicking toolbar buttons, you use a few simple symbols —
# for a heading,
**bold**,
- lists,
and | tables |.
The result stays readable as plain text and renders into clean, structured formatting anywhere. Files use the
.md extension.
Why it matters for AI
Large language models like Claude read structured plain text far better than raw PDFs, spreadsheets, or slide decks. Converting a file to Markdown strips away the messy binary formatting and hands the model clean, well-structured content — so it understands the document more accurately and you spend fewer tokens.
What this tool does
Mark-Down turns almost any file into clean, LLM-ready Markdown. Drop in one file, many files, or a whole folder —
PDF, Word, PowerPoint, Excel, HTML, CSV/JSON, images, and more — and get back tidy .md
you can preview, copy, download, or send straight to Claude.
- Preview each result rendered or as raw Markdown.
- Trim size with a token diet (Full / Compact / Caveman) before you send it.
- Download individually or as a single
.zip.
Files are used only to perform the conversion and are then automatically and permanently deleted — nothing is stored long-term, and we never sell or share your files. You upload at your own risk: Mark-Down is not responsible for any file uploaded to it. Please keep your own backups and don’t upload anything you aren’t allowed to share.