File to Markdown Converter
Convert CSV, JSON, XML, HTML, and plain text to clean Markdown instantly. Browser-based — your file never leaves your device. Inspired by Microsoft's open-source MarkItDown.
pip install markitdownRelated Tools
What is MarkItDown?
MarkItDown is an open-source Python tool released by Microsoft that converts files and office documents into clean Markdown for use with LLMs and AI pipelines. This browser-based version brings the same idea to the web — paste or upload your file and get clean Markdown instantly, with no server, no Python, and no install required.
Supported file formats
This browser tool supports CSV, JSON, XML, HTML, and plain text files. For heavier formats like PDF, DOCX, XLSX, and PPTX you will need Microsoft's original Python library (pip install markitdown) which handles those server-side using pdfminer, python-pptx, and mammoth.
Why convert files to Markdown?
Markdown is the preferred input format for LLMs like Claude, GPT-4, and Gemini because it preserves document structure — headings, lists, tables, and code blocks — while stripping unnecessary formatting noise. Converting your data to Markdown before feeding it to an AI produces significantly better results than pasting raw HTML or CSV.
Use cases
Preparing documents for LLM ingestion, building RAG (retrieval-augmented generation) pipelines, migrating content to documentation systems, converting data exports for AI analysis, and creating structured prompts from tabular data.
Frequently asked questions
Is my file uploaded to a server? No. All conversion happens in your browser using JavaScript. Your file never leaves your device.
Can I convert PDF files? Not in this browser tool — PDF requires server-side OCR. Use Microsoft's original pip install markitdown for PDFs.
What's the file size limit? There is no hard limit, but very large files (over 10MB) may be slow to process in the browser.