Guides
Document Conversion Guides
In-depth articles on converting documents to Markdown, using Markdown with ChatGPT and RAG pipelines, and getting the most from MarkItDown online.
Why Markdown Is the Best Format for LLMs and RAG Pipelines
Most useful knowledge lives in PDFs, Word files, and HTML pages — formats that add noise when fed to language models. Markdown removes that noise. Here is why structure without formatting overhead is the right starting point for any AI document workflow.
Guide · 8 min readHow to Convert PDF to Markdown for ChatGPT and Claude
ChatGPT's built-in PDF upload is convenient, but pasting clean Markdown gives you more control and better results. Here is how to convert your PDF, what to clean up, and how to structure the prompt.
Guide / Comparison · 9 min readmarkitdown vs Docling vs Marker: Which Document Converter Is Right for You?
Three strong open-source libraries convert documents to Markdown. They share an MIT license and a similar goal, but differ significantly in architecture, format support, accuracy, and intended use cases. Here is how to choose.
Guide · 6 min readMarkItDown Online: Using MarkItDown Without the CLI
Microsoft's MarkItDown has over 100,000 GitHub stars — but it is a Python library. Here is what a hosted web version adds, when you should still use the CLI, and how any2markdown wraps the same engine for browser use.
Guide · 7 min readWhat Gets Lost When You Convert Documents to Markdown
Every document-to-Markdown conversion involves some loss. This is not a bug — it is Markdown's design. Understanding what is lost, and what to do about it, is what separates a quick draft from a clean final output.
Converters
Format-specific converter pages with examples and guidance.