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Explain PDF

Upload a PDF and get a plain-language AI explanation of what it says. Text is extracted in your browser, then sent to PDFly's server, which forwards it to Google Gemini for the explanation.

Last Updated: August 2026Written by Ayaz Dilawar

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A note on privacy

PDFly extracts the PDF text in your browser. To generate the explanation, that extracted text is sent to PDFly's server, which forwards it to Google Gemini. The original PDF file is not uploaded; see the Privacy page for current data-handling details.

Explain PDF

Get an AI explanation of any PDF in plain language. Free, no signup. Text is extracted in your browser, then sent to PDFly's server and Google Gemini.

AI-powered

Text is extracted in your browser, then sent to PDFly's server and Google Gemini to produce the result. See the privacy note below.

Get a plain-language explanation of what a PDF says. The text is extracted in your browser, then sent to PDFly’s server, which forwards it to Google Gemini to write the explanation. Only the first 40,000 characters are used, scanned PDFs need OCR PDF first, and AI explanations can contain errors, so verify anything important against the original, especially for legal documents.

What is PDF explanation?

PDF explanation uses AI to read your document and explain it in plain language. It breaks down complex concepts, summarizes key points, and presents the information in a way that's easy to understand.

How it works

  1. 1Open PDFly's Explain PDF tool.
  2. 2Upload your PDF.
  3. 3The extracted text is sent to PDFly's server, which forwards it to Google Gemini to generate the explanation.
  4. 4You get a clear, plain-language explanation of what the document is about.

Limitations

  • The extracted document text is capped at 40,000 characters (roughly 10,000 tokens). Longer documents are automatically truncated to the 40,000-character limit before the explanation is generated.
  • The explanation is generated from the document text only — it will not cover anything beyond that character limit.

Troubleshooting

  • "No selectable text found in this PDF": The document is likely a scan or image-based PDF. Run OCR PDF first, then try explaining the result.
  • "Could not read this PDF": The file may be corrupted or password-protected. Try Unlock PDF or Repair PDF first.
  • "Something went wrong. Please try again": The AI service may be briefly busy, or the shared daily AI capacity may have been reached. Wait a moment and retry.
  • The explanation misses later sections of a long document: Text past the 40,000-character mark is truncated before processing — split long documents first with Split PDF.

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Frequently asked questions

The AI explains based only on your document's content, but AI-generated explanations can still contain errors or miss context. For critical documents, always verify against the original.
It can help you understand legal documents, but it's not a substitute for professional legal advice.
If the PDF has text (not just images), it works. For scanned documents, OCR first.

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