Long PDFs — research papers, legal documents, lengthy reports — take hours to read. Claude AI can summarise them accurately in under a minute, for free, with no subscription required. Here's exactly how to do it.
What you need
- A free Claude account at claude.ai
- The PDF you want to summarise (up to ~100 pages works well on the free plan)
Claude's free tier includes enough usage to summarise several documents per day. No credit card needed to sign up.
Step 1 — Create a free Claude account
Go to claude.ai and sign up with your email or Google account. The process takes under two minutes. You'll land in the main chat interface immediately.
Step 2 — Upload your PDF
In the chat input box, click the paperclip icon (or the attachment button) and select your PDF file. Claude accepts PDFs, Word documents, text files, and images. Once uploaded, the file name appears in the chat box.
Step 3 — Write your prompt
This is where most people underuse Claude. Don't just type "summarise this" — be specific about what you need. Here are prompts that work well:
- "Summarise this PDF in 5 bullet points, focusing on the key findings."
- "Give me a one-paragraph executive summary of this report."
- "What are the main arguments made in this paper? List them clearly."
- "Extract all data tables and present them in plain text."
- "Explain the methodology section in simple language."
Step 4 — Ask follow-up questions
Claude remembers the document within your conversation. After the initial summary, you can ask follow-up questions like "What does the author say about X?" or "Can you expand on point 3?" — it will answer based on the PDF content.
What Claude does well
- Academic papers — identifies hypotheses, methodology, results, conclusions
- Business reports — extracts key metrics, recommendations, action items
- Legal documents — summarises clauses and flags important terms
- Books and long guides — chapter-by-chapter breakdowns
Limitations to know
- Scanned PDFs (image-only) are harder — Claude reads text, not images of text. Use a PDF with actual selectable text for best results
- Very large PDFs (200+ pages) may hit context limits on the free tier — consider splitting the file
- Claude can make mistakes on highly technical or numerical content — always verify key figures
The free plan is genuinely useful. I've used it to get through three-hour research reads in ten minutes. For anything longer than 20 pages that you need to understand quickly, it's the first tool I reach for.
Alternative: Google NotebookLM
If you want to work with multiple documents at once — comparing several PDFs, asking cross-document questions — Google NotebookLM is a strong alternative. Both are free; Claude is better for a single document, NotebookLM is better for a research library.
Watch the step-by-step demo on the YouTube channel.