PDF Summarizer
Commercial use OK
380+ models
No watermark
No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Upload a PDF — research paper, legal contract, meeting minutes, user manual — and get a clean AI summary in seconds. Pick the length you want (one paragraph through full executive brief) and choose between our free self-hosted model or a premium model for the best quality. Cost scales with page count.
Summary
What people use PDF Summarizer for
Research papers
Get the abstract-quality summary of a 40-page paper in 10 seconds. Pick Detailed to keep methods + results.
Legal contracts
Reduce a 30-page contract to an executive brief with key terms, obligations, and red flags.
Lecture notes
Turn a semester of lecture slides into clean study bullets.
User manuals
Compress a 200-page hardware manual into quickstart steps.
Free.ai vs. other PDF summarizers
| Free.ai | ChatPDF | Humata | Adobe Acrobat AI | |
|---|---|---|---|---|
| Starting price | Free | $5/mo | $14.99/mo | $19.99/mo |
| Pick your LLM | — | — | — | |
| 5 length presets | — | — | ||
| Public API | — | — | ||
| Works without signup | — | — | — |
Advanced options
Result
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Summarize any PDF with AI for free.
How to Use PDF Summarizer
1
Enter your input
Type text, upload a file, or describe what you want. No account needed.
2
Click generate
Our AI processes your request in seconds using the best open-source models.
3
Download & share
Download, copy, or share your result. Free for personal and commercial use.
Use this tool via API
Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.
curl -X POST https://api.free.ai/v1/pdf/extract/ \
-H "Authorization: Bearer sk-free-..." \
-H "Content-Type: application/json" \
-d '{"file": "@document.pdf"}'Related Free AI Tools
PDF Summarizer — FAQ
Upload any PDF — research paper, contract, meeting notes, user manual — and Free.ai returns an AI-written summary in seconds. Pick the length (short paragraph → detailed section-by-section → bullet points → executive summary) and pick the LLM model that writes it.
About 200 tokens per page on the Standard model (self-hosted Qwen 3 30B, free). Premium models like GPT-5, Claude Sonnet 4.5, or Gemini 2.5 Pro are 2-12× more expensive but handle dense technical or multilingual documents better. A 10-page paper costs ~2K tokens on Standard or ~12K on a premium model — the exact quote appears before you hit Summarize.
Any text-based PDF up to 50 MB. Research papers (arXiv, SSRN), SEC filings, annual reports, legal contracts, textbooks, user manuals, product spec sheets, whitepapers, meeting minutes, medical papers, academic theses. Scanned PDFs need OCR first — we detect image-only PDFs automatically and suggest our OCR tool.
Hundreds of pages. Past about 50 pages (~30K words) we auto-truncate to fit the LLM context window; pick a premium long-context model (Gemini 2.5 Flash handles 1M tokens) if you need the full book summarized in one pass.
Five: Short (one paragraph, key conclusion only), Medium (3-5 paragraphs covering purpose + findings), Long (comprehensive, section-by-section), Bullet points (8-15 takeaways), and Executive summary (headline sentence + 3-5 bullets + recommendation).
Yes. Standard tier uses our self-hosted Qwen 3 30B, Mistral 7B, or DeepSeek R1 — all free. Premium tier gives you Gemini 2.5 Flash/Pro, Claude Sonnet 4.5 / Opus 4.6, and GPT-5 — better for legal, medical, or multilingual documents where nuance matters.
No. The PDF is written to a temp directory on our server, extracted, summarized, and deleted. Summaries are kept on our CDN for 24 hours (7 days if you have active credits) at the share link so you can send it around.
All 99 languages the UI supports. The LLM reads the source PDF in whatever language it is and writes the summary in the same language (or ask it to translate by adding "summarize in Spanish" via the chat mode).
You need to unlock it first — our tool detects password protection on upload and sends you to /pdf/unlock/ where you can strip the password if you own the document.
Yes — /pdf/chat/ lets you have a back-and-forth conversation about the document instead of getting a one-shot summary. Great for "what does section 3.2 say?" or "list all parties mentioned in this contract."
Free.ai is free and lets you pick the LLM. ChatPDF charges $5/mo and picks one model for you; Humata $14.99/mo; Adobe Acrobat AI Assistant $19.99/mo. We also expose a public API (/v1/pdf/summarize/) — the others gate theirs behind enterprise sales.
Yes — POST multipart to /v1/pdf/summarize/ with file + length + model fields. See /api/ for the curl snippet. The quote endpoint /v1/pdf/summarize-quote/?pages=N&model=M&length=L returns the exact cost before you upload.
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