PDF Summarizer Powered by AI — Online, No Install

Upload lecture slides, research papers, ebooks or scanned handouts and get the key points in seconds. Synt's AI PDF summarizer reads the whole document so you don't have to — and turns it into study material you can actually review. Works in your browser, no install needed — or grab the app.

Paste the text of a few pages of your PDF below and see the summary now — no sign-up.

Any PDF, Any Length Scanned Pages Too

Use it in your browser — free

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AI PDF summarizer showing the key points of a document

Try it now: paste the text of your PDF and see the summary

No sign-up needed. Paste a passage from the PDF (200 to 6,000 characters) and get the main idea and the key points — the same engine that summarizes whole documents in Synt.

Want the full summary, with a quiz and flashcards, saved in your account? Create your free account

Summarize Every PDF in Your Course

Lecture Slides

Turn 80-slide decks into a one-page review sheet with the concepts that will actually be on the exam. Need cards instead? Try PDF to flashcards.

Research Papers

Get the research question, methodology and findings without wading through 30 pages of academic prose.

Textbook Chapters

Long chapters are summarized section by section, keeping definitions, formulas and key arguments.

Scanned Documents

Photocopied handouts and scanned book pages work too — Synt extracts the text before summarizing.

How to Summarize a PDF in 3 Steps

Upload Your PDF

Pick any PDF from your phone, email or cloud storage — slides, papers, ebooks or scans.

AI Reads the Whole Document

Synt analyzes every section and identifies the key concepts, definitions and conclusions.

Review, Quiz Yourself, Remember

Read the structured summary, then generate flashcards or a quiz from it to lock the material in.

PDF Summarizer FAQ

How do I summarize a PDF with Synt?

Open Synt, tap upload, and pick the PDF from your phone or cloud storage. The AI reads the document and returns a structured summary of the key points in seconds.

Can it summarize long PDFs like textbooks?

Yes. Long PDFs are processed section by section, so a 200-page textbook chapter or a full thesis gets summarized without losing the important details.

Does it work with scanned PDFs?

Yes. Synt extracts text from scanned pages and photos, so scanned book chapters and photocopied handouts can be summarized too.

Is the PDF summarizer free?

Creating an account is free, and you can summarize pasted text and photos of your notes without paying — in your browser at app.synt.app or in the iOS and Android app. Summarizing PDFs is a Pro feature, which also unlocks unlimited summaries and longer documents.

Can I use it on my computer, without installing anything?

Yes. Go to app.synt.app in any browser, create a free account and you get the same summaries, quizzes and flashcards as in the app; your material syncs between your phone and your computer.

Can I study from the summary afterwards?

That's the point of Synt: any PDF summary can be turned into flashcards or a practice quiz with one tap, so you can test yourself instead of just reading.

Want the manual method too?

Read our step-by-step guide on how to summarize a PDF — with and without AI.