About the AI PDF Summarizer
AI PDF Summarizer reads the text of a PDF in your browser and asks an AI service for a summary: a short one, a list of key points, or a detailed paragraph. The PDF file itself is not uploaded. Only its extracted text is sent to the AI service, is used to write the answer and is not stored. The tool looks at up to about 9,000 characters, which is roughly the first 5 to 8 pages of ordinary text, and it tells you when a document was longer and only its first part was used. It works with PDFs that have real, selectable text, such as reports, articles, e-books and contracts. Scanned PDFs are pictures of pages, so run them through PDF OCR first. As with all AI, check important details against the original.
Updated September 2026
How to use the AI PDF Summarizer
- 1Select a PDF that has selectable text.
- 2Choose Key points, Short or Detailed.
- 3Press Summarise PDF. The tool reads the text and sends only the text to the AI.
- 4Read the summary, and press Try again for another version.
- 5Copy it, and check important facts against the PDF.
What a PDF summary is good for
PDFs are the format of reports, research papers, manuals, statements and contracts, and they are often long. A summary lets you find out what a document is about, which sections matter and what it asks of you before you invest time in reading it fully.
It works well as a first pass on a study paper, a company report or a set of meeting minutes, and as a way to prepare questions before reading in detail. It is not a replacement for reading anything you must sign or act on.
How the tool handles your file
- The text is extracted in your browser with pdf.js, so the file never leaves your device.
- Page numbers on their own lines are dropped and words split by a hyphen at the end of a line are joined.
- Only the text, cut to the limit at the end of a sentence where possible, goes to the AI.
- You see a note when the PDF was longer than the limit and how much of it was used.
- Scanned files are detected, and you are told to use PDF OCR instead of getting an empty answer.
Choosing key points, short or detailed
Key points give a bulleted list in the order of the document, which is the easiest to scan and copy into notes. Short is two or three sentences, good for deciding whether a file is relevant. Detailed is a single paragraph that keeps more names and numbers, useful when you need the substance without the bullets.
If a summary seems to miss a section, remember that only the start of a long PDF is read. Split the file into parts with Split PDF or pull out the pages you need with Rearrange PDF Pages, then summarise the part you care about.
On phone and computer
On a phone, select the PDF from Files or your cloud drive. Reading the text takes a few seconds for a normal document. The summary appears below the button and can be copied to your notes or a message.
For text you have already copied, AI Summarizer takes pasted text directly. To make the source easier to read afterwards, you can compress it with Compress PDF or pull its text out with PDF to Text.
Features
- Reads the PDF's text in your browser
- Only the text is sent to AI, never the file
- Key points, short and detailed summaries
- Tells you if the document was cut because it was long
- Detects scanned PDFs and points you to OCR
- Cleans page numbers and broken words before summarising
- Free for up to 30 answers a day
Frequently asked questions
How do I summarise a PDF?
Select your PDF here, choose the type of summary and press Summarise PDF. The tool extracts the text from the pages, sends that text to our AI service and shows the summary in a few seconds. You can copy the summary or press Try again to get another one.
Is my PDF uploaded?
The file itself is not uploaded. Your browser reads the text from it, and only that text is sent to the AI service to write the answer. It is not stored. Do not use the tool on documents with information you must never send over the internet.
How long can the PDF be?
The AI looks at up to about 9,000 characters of text at a time, which is around 5 to 8 pages of normal text. If your document is longer, the tool tells you what part was used. To cover a long document, split it into sections with Split PDF and summarise each part.
Why does it say my PDF has no text?
Scanned documents and photos saved as PDF contain pictures of pages instead of text, so there is nothing to read. Use PDF OCR to turn the pictures into text first, then paste that text into AI Summarizer.
Can it summarise a password-protected PDF?
Not directly. Remove the password with Unlock PDF first, and then summarise the unlocked copy.
Can I trust the summary?
Use it as a quick guide, not as the final word. AI can miss details, blur numbers or over-simplify. Check dates, amounts and names in the PDF itself, especially for contracts, medical or legal documents.
Does it work in other languages?
Yes, it answers in the language of the document. Quality is best for widely used languages, and text in scripts that PDF readers extract badly may come out garbled, which leads to a poor summary.