CSVLens – AI-powered local CSV analysis without uploads

Summary: CSVLens is a browser-based AI tool that analyzes large CSV files locally without uploading data. It uses WebAssembly-powered DuckDB to run SQL queries and Claude AI to translate natural language questions into SQL, delivering instant charts while keeping data private.

What it does

CSVLens loads massive CSV files in seconds and allows users to ask questions in plain English, which are converted into SQL queries executed entirely in the browser. It automatically generates relevant charts and supports loading multiple CSVs with join capabilities.

Who it's for

It is designed for users needing quick insights from CSV exports without uploading sensitive data or writing SQL, such as analysts working with CRM or database exports.

Why it matters

CSVLens eliminates the need for uploading data or complex tools by providing fast, private, and interactive CSV analysis directly in the browser.