Online Tool Store
Chat With PDF
Extract the text of a PDF and ask questions about it — the tool searches the document locally for the most relevant passages and returns them as answers, entirely on your device.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Sample PDF (a short remote-work policy) — choose your own file to replace it.
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How Chat With PDF works
- Choose a PDF — its pages are rendered and their text layer is extracted locally using pdf.js, never uploaded.
- The extracted text is grouped into passages by page and line spacing, building a small local index.
- Type a question and click "Ask" (or press Enter) — the question is broken into keywords, ignoring common words like "the" and "how".
- Every passage is scored by how many of those keywords it contains, and the top three highest-scoring passages are shown with matches highlighted.
How the matching works
This is keyword search, not an AI model — a passage's score is the count of keyword matches, weighted higher for an exact word match than a partial substring match. It's a simple, fully client-side version of the same idea behind "search inside this document," tuned to surface the passages most likely to answer your question rather than to write new sentences.
FAQ
Is this powered by an AI language model?
No — there's no model and no server call. It extracts the PDF's text with pdf.js, splits it into passages, and ranks those passages by keyword overlap with your question, returning the best-matching excerpts rather than a generated summary.
Why do I get passages back instead of a written answer?
Because the matching is keyword-based, not generative — showing you the actual source text (with matched terms highlighted) is more honest about what the tool actually found than fabricating a natural-language answer it can't verify.
Does it work on scanned PDFs (images of text)?
No. It reads the PDF's embedded text layer, so a scanned document with no OCR text layer will show zero indexed passages — this tool doesn't perform image-based text recognition.
How we compare
| Feature | Online Tool Store | Your PDF reader's find (Ctrl+F) | An AI PDF chat site |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | N/A | ✗ |
| No sign-up required | ✓ | ✓ | ✗ |
| Free, no watermark | ✓ | ✓ | ✗ |
Ctrl+F only matches exact substrings, so it misses a passage that answers your question in different words. An AI PDF chat site can do more, but it means uploading your document to a third-party server. Chat With PDF sits in between: keyword-ranked passages, computed entirely on your device.