Quick Answer: How Private PDF Chat Works
BunnyPDF pairs in-browser PDF parsing with hardware-accelerated local machine learning. When you select a document, the Qwen 3 (0.6B) model executes directly on your computer's graphics processor via WebGPU. Your sensitive business records, contracts, and financial audits are analyzed directly in memory without internet transmission.
Ideal for: Confidential legal agreements, financial statements, proprietary business profiles, academic research, and medical forms.
How to Chat with a PDF in 3 Easy Steps
- Upload your PDF document: Drag and drop any PDF into the workspace above. Text and high-resolution page thumbnails are parsed locally in seconds.
- Load on-device Qwen 3 AI: Tap to initialize Qwen 3 (0.6B) in local WebGPU memory for instant document reasoning and summarization.
- Ask questions and extract data: Type any question, search for specific credentials (like phone numbers, GSTIN, or invoice dates), or click dynamic suggestion chips. Answers stream back in formatted Markdown.
What Can You Ask Your PDF?
BunnyPDF's intelligent query engine adapts to any document type, understanding queries regardless of phrasing or capitalization:
- Invoices & Receipts: Extract total amounts, due dates, billing addresses, line-item pricing, and payment terms.
- Company Profiles & Brochures: Instantly retrieve contact numbers, official emails, registration credentials (GSTIN, CIN, PAN), and core service capabilities.
- Legal Contracts & NDAs: Query governing jurisdictions, termination clauses, indemnity liabilities, and effective dates.
- Resumes & CVs: Summarize candidate career histories, technical competencies, educational qualifications, and key achievements.
- Research Papers & Theses: Generate executive abstracts, examine research methodologies, and extract key experimental findings.
On-Device WebGPU vs Cloud AI Services
Traditional PDF chat tools send your private files to third-party cloud servers. Here is how BunnyPDF's local WebGPU engine compares:
| Feature | BunnyPDF (Qwen 3 WebGPU) | Cloud AI Tools (ChatPDF, AskYourPDF) |
|---|---|---|
| Document Privacy | 100% Local (0 Bytes Uploaded) | Stored on third-party cloud servers |
| Subscription Cost | Free Forever ($0.00 / month) | $15 – $25 / month |
| Account Requirement | No Signup Required | Mandatory account or email registration |
| AI Architecture | On-Device Qwen 3 (WebGPU) | Closed cloud APIs |
| Offline Capability | Works offline once model is cached | Requires continuous active internet |
Frequently Asked Questions
Are my files or questions saved on BunnyPDF servers?
No, files and questions are never saved or uploaded. All text parsing and AI inference occur strictly inside your browser tab using WebGPU. Your documents remain completely confidential.
Can I extract exact details like numbers, dates, and credentials?
Yes, the model accurately retrieves specific parameters. Simply type the field name (e.g., “GSTIN”, “phone”, “due date”, “total amount”). The query normalizer handles all case variations automatically and quotes exact values from the text.
Why does BunnyPDF use Qwen 3 for document chat?
Qwen 3 (0.6B) provides an exceptional balance of fast download size (under 350 MB), low memory footprint, and high factual comprehension. It runs smoothly on modern laptops and desktops via WebGPU without requiring expensive cloud subscriptions or sacrificing document privacy.
Do I need to install any software or browser extensions?
No installation is needed. Everything operates natively in your standard web browser using modern WebGPU standards.
What web browsers are compatible with WebGPU?
WebGPU is natively enabled in Google Chrome 113+, Microsoft Edge 113+, Brave, Opera, and Safari on macOS Sequoia with hardware acceleration enabled.