Summarize a PDF
The key points of a long PDF — plus an optional summary and slide outline.
Using toolbook means you agree to our Terms and Privacy Policy.
or drag it here
One PDF file
Your files stay on your device
How to use it
Drop a PDF here to get the key sentences from every section, with page numbers. Chrome and Edge can add a summary and slide outline. Your PDF stays private.
Got a long report and no time? Drop the PDF onto the box above. You get the most important sentences from each section, with page numbers — straight from the document, so nothing is made up. This works in every browser, even on your phone.
Using Chrome or Edge on desktop? You can also get a written summary in plain words, and a ready-made slide outline for a presentation.
Long documents are summarised a section at a time and then combined — the tool tells you when that happens. The section summaries stay closest to what the document actually says.
Scanned pages have no text to read, but the tool can read them for you on a second pass.
FAQ
How do I summarise a PDF for free?
Drop it here. You get the key sentences straight away, plus a written summary and slide outline in Chrome or Edge.
Does it work without AI?
Yes. The key sentences work in every browser. The written summary is an extra.
Why is my summary split into sections?
The built-in model can only read so much at once, so long PDFs are summarised in parts and then combined.
How long a PDF can it handle?
No page limit. Very long documents just take longer, and progress is shown.
My PDF is a scan and nothing came out. Why?
Scans are pictures of pages. Use the option to read those pages and try again.
Is my PDF uploaded or used for training?
Neither. Everything happens on your device.
How it worksFor the curious
The PDF is read with pdf.js and split into sections on page boundaries. Key sentences are extractive: each is scored on the words it shares with the rest of its section, with a bonus for appearing early, and the best are shown in reading order. No model is involved.
The written summary uses the browser’s built-in Summarizer API. Its context window holds a few thousand tokens, so long documents are summarised section by section, then the summaries are summarised (map, then reduce); that second pass compresses the middle twice, and the tool says when it ran.
The slide outline uses the Prompt API with a JSON schema constraining the reply to titled slides with bullets. The reply is parsed and checked, and a malformed one is reported rather than rendered. It is built from the condensed text, never the whole document.
Scanned pages can be read with Tesseract OCR on an opt-in second pass. The models are downloaded and managed by your browser; your document is never sent anywhere or used for training.