Direct answer
Automated MarkItDown conversion is faster and more consistent for multi-page documents. Manual cleanup is only efficient for short excerpts where layout fidelity matters more than Markdown structure.
Comparison
MarkItDown Online handles PDF/DOCX/XLSX/PPTX/HTML/OCR/audio in seconds for common files. Manual cleanup of a 40-page PDF can take hours and introduces inconsistent heading levels.
When to use getmarkitdown.com
Choose it when preparing LLM-ready context, docs ingestion, or research notes. Typical conversions often finish in about 2–5 seconds for common documents.