Why Uploading a PDF to Claude Costs You 70,000 Tokens, and the Free Microsoft Fix
MarkItDown, the free Microsoft converter, and the one setting that makes it automatic
What this is
Every file you hand an AI model gets read in full. Not the words you care about, the whole thing: the layout, the tables, the image data, the headers and footers, the invisible structure holding the page together. You pay for all of it, on every message that file stays in the conversation.
MarkItDown is Microsoft's answer. It is free, open source under MIT, and it does one job: it takes almost any file and hands back clean Markdown text. Read on the GitHub API on 9 September 2026 it has 182,033 stars and 13,371 forks. Star counts move, so check the repository page before you quote that figure to anyone.
This guide is the part that would not fit in the video: the install, the exact commands, the MCP server config for Claude Desktop word for word, the formats table, what it handles badly, and how to measure the saving on your own documents instead of taking mine.
- Part 1, why a PDF is expensive, and what is actually costing you.
- Part 2, install it, in one line.
- Part 3, the three commands you will actually use.
- Part 4, the MCP server, so you never think about this again.
- Part 5, what it does badly, and the two ways round it.
- Part 6, measure your own saving in about two minutes.
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