Guide

How to Summarize a PDF on iPhone

Short answer: To summarize a PDF on iPhone or iPad, open the document in PDF JustFit, download the on-device AI model once if you have not already, and ask for a summary of the document or a section. Answers include page citations.

When you need this

  • You need the gist of a document before reading it properly.
  • You are triaging several long documents and need to prioritise.
  • You want a section-level summary rather than the whole document.
  • You need to brief someone else on a document quickly.

Steps

  1. Download the AI model once

    AI chat uses an on-device model, about 1 GB, downloaded one time.

  2. Open the document

    Load the PDF in PDF JustFit. Scanned pages are OCR-recognised automatically.

  3. Ask for a summary

    Ask for a summary of the whole document, or of a specific chapter or section.

  4. Check the citations

    Answers include page citations, so a claim in the summary can be traced back to its page.

  5. Go deeper where needed

    Ask follow-up questions about the sections that matter most.

A summary with traceable sources

A summary is only useful if you can check it. PDF JustFit returns page citations with answers, so anything that looks important can be verified on the page it came from.

Works on scanned documents too

Because scanned pages are OCR-recognised automatically, a scanned report or textbook chapter can be summarised in the same way as a digital PDF.

Privacy and limitations

Summaries are generated, not authoritative

An AI summary is a generated aid, not a substitute for reading the document. Use the page citations to verify anything you intend to rely on.

Model download required

Summarising uses the same on-device model as AI chat, which is downloaded once and then works offline.

Frequently asked questions

How do I summarize a PDF on iPhone?

Open the PDF in PDF JustFit, download the on-device AI model once, and ask for a summary. Answers include page citations so you can verify the source.

Can PDF JustFit summarize a scanned document?

Yes. Scanned pages are OCR-recognised automatically, so a scanned document can be summarised like any other PDF.

Keep your documents light, organized and private

PDF JustFit: Compress, AI Chat is available on the App Store for $9.99. Requires iOS/iPadOS 26.5 or later.