💬 Chat with PDF — Free, Private, On-Device

Ask questions about your PDF and get page-cited answers. The AI runs on your device — nothing is uploaded, no account needed, free and unlimited.

About Chat with PDF (PDF Q&A)

Chat with any text-based PDF and get answers with page citations — without sending your document to a server. Unlike cloud services such as ChatPDF, everything here runs in your browser: a hybrid retrieval engine finds the most relevant passages, and in AI mode an on-device language model composes a concise answer that is checked sentence-by-sentence against the retrieved evidence before it is shown.

Why this matters: contracts, medical records, financial statements, and internal reports are exactly the documents people most want to question — and exactly the ones that should not be uploaded to a third-party AI service. On-device processing means free, unlimited questions across multiple PDFs at once, with no sign-up and no data collection of any kind.

Common Use Cases

📋 Contracts & Agreements

Find payment terms, termination clauses, or renewal dates without reading every page.

📚 Research Papers

Jump to the methodology, conclusions, or cited references in long academic PDFs.

📊 Financial Reports

Locate revenue figures, risk factors, or footnotes in quarterly filings instantly.

📖 Manuals & Guides

Search technical documentation or user manuals for the exact setting or step you need.

Frequently Asked Questions

Does my PDF get sent to any server?

No. Your PDF and every question you type stay entirely in your browser. There is no upload, no cloud processing, and no data collection of any kind.

How is the answer generated?

First, a hybrid retrieval engine (BM25 keyword + TF-IDF vector + entity overlap) ranks all passages in your PDF. In AI mode, an on-device language model generates a concise answer from those retrieved passages, then sentence-level evidence checks validate support before display. Source pages are always shown for verification.

Why is my PDF not returning results?

Scanned or image-based PDFs don’t contain embedded searchable text. Run them through our on-device OCR PDF tool first, then re-upload here. The tool will warn you if it detects a scanned PDF automatically.

Is there a page limit?

There is no hard page limit. Very large PDFs (500+ pages) may take a few extra seconds to index — progress is shown throughout. You can also load several PDFs at once and ask questions across all of them.

Local-only processingNo uploads for most toolsOffline-capable

Processing Mode: Local-Only On Device

This tool processes files in your browser on your device. No backend upload is required for the core workflow.

How to use PDF Q&A

1. Upload your PDF
Click or drag your PDF into the PDF Q&A tool. The document is indexed entirely in your browser - no content is sent to a server.
2. Choose Fast or Smart mode
Auto mode picks the best strategy for your device. Fast mode uses local retrieval only. Smart mode adds on-device SLM reasoning over retrieved evidence.
3. Type your question
Enter a question or keyword in the search box. For example: "What is the refund policy?" or "annual revenue 2023".
4. Review cited answers
The tool returns matching passages with page citations. In Smart mode, answers include evidence support checks and can enforce a strict evidence threshold.