LocalMD - Offline Client-Side Markdown Converter
LocalMD is a 100% secure, offline client-side document converter that instantly parses complex proprietary files into clean, semantic, and LLM-ready Markdown text. Because all conversion logic executes directly inside your web browser using HTML5 APIs, WebAssembly, and local JavaScript libraries, no data is ever uploaded or transmitted to any external server. This guarantees absolute data privacy and prevents sensitive corporate files from leaking.
Supported Document Conversion Formats
- PDF to Markdown (.pdf): Extracts text layout flows, structures paragraphs, and parses list structures using a local instance of pdfjs-dist. For large documents, the live preview renders dynamically while allowing immediate download options.
- Microsoft Word (.docx): Renders Word document headings, hyperlinked texts, bold and italic characters, and bulleted or numbered list structures using Mammoth.js.
- Excel & Spreadsheet Files (.xlsx, .xls, .csv): Converts table structures and grids into clean GitHub Flavored Markdown (GFM) tables using SheetJS. Perfect for tabular data analysis.
- HTML Code Pages (.html): Strips boilerplate scripts, styles, metadata, and nav wrappers, returning only the primary textual body formatted in clean markdown.
- ZIP Archives (.zip): Recursively extracts compressed files, runs the converter on all compatible formats, and packages the markdown results back into a clean ZIP structure for downloading.
AI, RAG, and LLM Context Optimization Heuristics
LocalMD is optimized for preparing documents for Generative AI engines, Retrieval-Augmented Generation (RAG) databases, and large language models (LLMs) such as Claude 3.5, GPT-4o, and Gemini 1.5. By standardizing document typography and stripping layout noise, it reduces token footprint. It features a local token savings estimator showing real-time token count comparison and savings percentages, helping you maximize the efficiency of your AI context windows. This enables highly structured data retrieval without bloated token overhead.
Offline PWA and Service Worker Capabilities
LocalMD is a Progressive Web App (PWA) with full offline support. It registers a local service worker that precaches the core application shell and heavy conversion assets, ensuring it functions seamlessly in environments without internet connectivity. You can also install the application directly to your desktop or mobile home screen for a native app experience.
System Directory Navigation
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