LocalRAG!
AI knows everything — except what's in your documents
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Seiji Nakaya

LocalRAG! - AI knows everything — except what's in your documents

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AI knows everything — except what's in your PDFs, contracts, and research papers. LocalRAG fixes that. Import PDF, EPUB, DOCX + 6 more formats. Ask questions and get answers with page-number citations — powered by Claude AI. Documents are processed on your device. No cloud uploads. 3-stage PDF extraction handles scanned docs via OCR. Organize into collections. Free (5 Q/day), Standard ($4.99/mo), Pro ($9.99/mo), or bring your own API key.

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Seiji Nakaya
Maker
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Hi everyone! I'm the maker of LocalRAG. I built this because I wanted to chat with my PDF documents using AI, but I wasn't comfortable uploading sensitive files to cloud services like ChatPDF. Tax returns, medical records, client contracts — these shouldn't have to leave my device just to ask a question about them. **The core idea:** All document processing happens on your iPhone/iPad. Text extraction, chunking, and TF-IDF indexing are 100% local. Only the relevant text chunks (not the full document) are sent to Claude AI when you ask a question. **Technical approach:** - NLTokenizer for sentence-level chunking (500 chars, 80 char overlap) - TF-IDF cosine similarity + bigram matching for hybrid search - 3-stage PDF extraction: PDFKit → copy-protection bypass → Vision OCR - Supports 9 document formats natively **Business model:** Free tier (5 questions/day with Haiku), paid subscriptions for more usage, or bring your own Anthropic API key for unlimited access with any Claude model. I'd love to hear your feedback. Privacy-first AI is still a niche, but I think it's an important one.