CSV Viewer - zero-permissions no-network

View CSV files as tables. Drag and drop. Zero permissions, zero network calls. All processing is local.

A lightweight CSV viewer that runs entirely in your browser. Click the toolbar icon, drop a CSV file (or click to browse), and instantly see your data as a clean, readable table. How it works 1. Click the CSV Viewer icon in your toolbar 2. Drag a CSV file onto the page, or click "Choose File" 3. Your CSV is parsed and displayed as a styled table Security - Requests zero browser permissions - Makes no network requests of any kind - No external scripts, CDNs, or third-party libraries - No data collection, no tracking, no storage - Files are read locally using the browser's FileReader API and never leave your machine - All cell data rendered via textContent to prevent injection Features - Drag-and-drop or file picker - First row displayed as a styled header - Alternating row colors and hover highlighting - Horizontal scroll for wide tables - Shows up to 200 rows with a count notice for larger files - Tab title set to the filename - "Open another file" button to quickly switch files