MarkItDown Online

MarkItDown Online is a hosted document-to-Markdown conversion platform designed for teams and individuals who need clean, readable Markdown from messy source files for use in RAG pipelines, search indexing, LLM contexts, and review workflows. It provides an intuitive web interface where users can upload files, paste text, submit URLs, or pass data URIs, and instantly receive structured Markdown output. The platform supports a wide range of formats including PDF, DOCX, XLSX, PPTX, HTML, CSV, JSON, images with OCR, audio transcription, and more. Built on the open-source MarkItDown project from Microsoft, it adds a secure, isolated worker environment to handle untrusted files safely. Users can choose specific conversion profiles to tailor output, and the API allows seamless integration into existing systems. With a free tier offering limited conversions, it scales to paid plans for higher volumes. The service emphasizes transparency, offering source notes and warnings to help reviewers trust the conversion. Its target audience includes developers, data scientists, AI engineers, content creators, and knowledge managers who need to convert documents into a universal format that is both human-readable and machine-friendly.