What SumAI does with a PDF
Give SumAI a PDF and it reads the text of the document, then writes a summary in the style you chose. From that one summary you also get:
- Ask AI, to question the document in plain language.
- A mind map of the main idea and its subtopics.
- A quiz and flashcards built from the content.
- A place in your library, with search, favorites and tags.
That makes SumAI useful for two different jobs. One is getting the point of a document fast. The other is actually learning what is in it.
Which PDFs work
The requirement is simple: the PDF needs selectable text.
Most PDFs made on a computer have it: papers downloaded from a journal, reports exported from a word processor, slides saved as PDF, e-book chapters. PDFs made by photographing or scanning paper often do not, because each page is stored as an image.
How to tell: think about where the file came from. A PDF you exported, downloaded from a publisher or saved from a website is almost always text. A PDF that began as a photo or a scan of paper is the risky kind. If you open it and cannot select or search a single word, it is an image-only scan.
One caveat: being able to select a word is a good sign but not proof. Apple’s PDF viewer can recognize text in a scanned page on the fly, so a scan can look selectable on an iPhone while the file itself still contains only images.
If it is a scan: use a scanning or PDF tool that performs OCR (optical character recognition) and saves a searchable PDF, then give that version to SumAI.
Good uses for a PDF summary
- Research papers. Read a Study Guide summary to decide whether the paper deserves a full read, then ask about the method or the results.
- Reports and white papers. Get the findings and recommendations without the forty pages around them.
- Course readings. Summarize a chapter, then use the flashcards before a seminar or exam.
- Manuals and documentation. Ask a direct question instead of hunting through the table of contents.
What a summary cannot do
SumAI works from the text of a document. A few honest limits follow from that:
- Charts, figures and images are not read unless their content also appears in the text.
- Precise details matter. For numbers, quotations, legal wording or anything you will rely on, check the summary against the original document.
- A summary is a starting point. It tells you what a document says and where to look. It does not replace reading the parts that matter to your decision.
PDFs, videos and articles in one library
Because SumAI also summarizes YouTube videos and web articles, a paper, the lecture that explains it and a blog post about it can sit side by side under the same tag in your library.
Last updated November 12, 2026.