Source: https://parquetviewer.vercel.app/llms.txt

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> A browser-based Parquet file viewer with SQL support, powered by DuckDB WASM. Upload, view, query, and inspect Parquet files instantly in your browser without sending data to a server.

## Core Features
*   **100% Client-Side Processing**: Files are processed locally in your browser. Data never leaves your machine.
*   **SQL Query Editor**: Run complex SQL queries against your uploaded Parquet files instantly, using WebAssembly.
*   **Interactive Data Explorer**: A powerful data grid to view, filter, sort, and paginate through massive Parquet files seamlessly.
*   **Schema Inspection**: Automatic data type inference, displaying exact column metadata, row counts, and providing JSON/SQL export options.
*   **Parquet Generator**: Generate and build Parquet files efficiently.

## Site Structure
*   [/](https://parquetviewer.vercel.app/): Landing page and file upload portal.
*   [/data-explorer](https://parquetviewer.vercel.app/data-explorer): Main interface for viewing tabular Parquet data (Requires File Upload).
*   [/schema](https://parquetviewer.vercel.app/schema): Detailed schema and column metadata inspector (Requires File Upload).
*   [/query-editor](https://parquetviewer.vercel.app/query-editor): Advanced DuckDB SQL query execution interface (Requires File Upload).
*   [/parquet-generator](https://parquetviewer.vercel.app/parquet-generator): Tool to generate new Parquet files.
*   [/settings](https://parquetviewer.vercel.app/settings): Configuration and theme preferences.

## Technical Architecture
*   **Frontend**: React (Vite), TypeScript, Tailwind CSS, Shadcn UI
*   **Data Engine**: DuckDB WASM (WebAssembly)
*   **State Management**: React Context & LocalStorage
*   **Rendering**: Native Vite Static Site Generation (SSG) for SEO optimization and instant loading.