PDF to Markdown for Claude
Claude reads PDFs well and has a large context window, but clean Markdown still pays off: it is more token-efficient, keeps tables and math reliable, and, through the hosted MCP, Claude can convert a PDF itself as a tool.
A big context still rewards clean input
Claude's large context window means you can fit a long document, but fitting it and reasoning over it well are different things. Raw PDF text carries the document's layout problems with it: merged columns, broken tables, scrambled equations. Converting to Markdown removes that noise. Tables become aligned Markdown tables, the heading structure gives Claude an outline, formulas are kept as notation, and the text is more compact, so the same document costs fewer tokens. That leaves more room for your instructions and Claude's analysis, and it makes prompt caching and retrieval far more dependable because the text is stable and clean.
Give Claude a PDF as Markdown
No account needed to convert. Works in claude.ai and the Claude apps.
Copy or download
Preview the result, then copy it or download the .md file.
Add it to Claude
Paste the Markdown, or attach the .md file, with your question in the same message.
Ask
Ask about the document. Tables, headings and formulas are intact, so the answers hold up.
What Markdown does for Claude
Token-efficient
Compact Markdown stretches even a large context window further, so more of a long document fits per request.
Cache-friendly
Stable, clean text is ideal for prompt caching: the same document prefix can be reused across many questions.
Tables and math
Real tables and kept formulas mean Claude reads the data correctly, not a scrambled grid.
Ready for RAG
Clean Markdown chunks cleanly for a retrieval pipeline built on Claude.
Convert via the hosted MCP
Because the converter ships a hosted MCP endpoint, Claude can convert PDFs itself instead of you preparing the Markdown by hand.
How it works
MCP (Model Context Protocol) lets an assistant call external tools. Add the converter's hosted MCP endpoint to an MCP-capable Claude client, and Claude gains a tool to turn a PDF URL or upload into Markdown on demand, then reason over the result, all in one conversation.
What you need
Long documents and Claude Projects
Claude is at its best on long, structured documents, which is exactly where converting first matters most. If you return to the same material often, add the Markdown to a Claude Project as knowledge, so every conversation in that project can reference it without re-uploading; clean Markdown keeps that shared context small and stable. For a single deep dive, paste or attach the .md file and ask Claude to build an outline before you drill into a section, so the structure guides the analysis. When several documents belong together, convert each to Markdown and add them as a set; the aligned tables and consistent headings let Claude compare across them reliably. And if you would rather not prepare files at all, the hosted MCP turns conversion into a tool Claude calls itself. The conversion is free to try, so you can see the difference clean input makes before changing how you work.
Common questions
Can Claude read a PDF directly?
Yes, Claude can read PDFs, including through its API. Converting to Markdown still helps: it is more token-efficient and keeps tables and formulas reliable, especially for long documents or repeated use.
Why convert a PDF to Markdown for Claude?
Clean Markdown is compact, so even Claude's large context goes further, and tables and math stay intact. It is also the right form for prompt caching, chunking and RAG, where stable text matters.
What is the hosted MCP and how do I use it?
The converter exposes a hosted MCP (Model Context Protocol) endpoint. In an MCP-capable Claude client you add the endpoint as a tool, and Claude can convert a PDF to Markdown itself, with no copy-paste. See the developer hub for the endpoint and authentication.
Does Markdown save tokens with Claude?
Yes. Clean Markdown is more compact than raw PDF text, so a document costs fewer tokens, leaving more of the context window for your questions and Claude's reasoning.
What about scanned PDFs?
OCR turns a scanned or image-only PDF into text first, so Claude can work with documents that are essentially images. See scanned PDF to Markdown.
Is it free?
Yes. Convert anonymously in the browser on the free tier (3 slots, 10 MB files, a 15-minute time budget, 1-hour retention). Paid tiers raise every limit.