Ask questions about your PDFs, Word docs, and text files — answered by an AI that runs entirely in your browser. Nothing is ever uploaded.
The model downloads once (it's a few hundred MB — like a podcast episode), is cached by your browser, and from then on loads instantly and works fully offline.
Supported: .pdf, .docx, .txt, .md, .csv, .json, .html — up to 50 MB each. Documents are read and indexed on your device only, kept in memory, and forgotten when you close the tab.
On-device AI by WebLLM (Apache 2.0)
running Alibaba Qwen 2.5 (Apache 2.0) and
Microsoft Phi 3.5 (MIT) models.
Document search and the CPU fallback by transformers.js (Apache 2.0).
PDF reading by PDF.js (Apache 2.0),
Word reading by mammoth.js (BSD-2-Clause).
Open-source acknowledgements
AI Document Chat is a private ChatGPT-style assistant for your own files. Drop in contracts, reports, manuals, meeting notes, or research papers and ask questions in plain English — "What's the termination clause?", "Summarize the findings", "What did we agree to pay?". The AI reads your documents, answers your question, and shows you the exact passages it relied on.
The difference from every other "chat with PDF" service: your documents never leave your computer. The language model itself — an open-source AI — downloads once into your browser's cache and runs right on your own device — on the graphics chip via WebGPU, or on the CPU with a compact model if your browser doesn't support WebGPU. There is no server, no upload, no account, and no per-question fee. After the first load it works completely offline: you can literally turn off your Wi-Fi and keep chatting.
No accounts, no upload queue, no per-document fees, no "free trial pages" — and no possibility of a data breach, because there's nothing to breach. Your documents stay where they belong: with you.
This tool runs the AI language model in your browser: the model downloads to your device once, then reads your PDF locally and answers questions about it. Your document never travels over the network, which you can verify in your browser's network tab.
Uploading sensitive documents to cloud AI services means a copy passes through and may be retained by their servers. The safe pattern is local processing: here the lease, policy, or report is read on your own machine and no copy exists anywhere else.
Yes. After the one-time model download, everything runs on your device, so you can question a document on a flight or behind a strict firewall.
PDFs, Word documents, and plain text files. Load the file, wait a moment while it is read, and start asking questions like what does this lease say about subletting or summarize section 4.
Free, no account, and no per-question pricing. Because your own device does the work, there is no server bill to meter you against.