Open CSV files instantly. On any device.

Why a dedicated CSV viewer?

Spreadsheet apps were never built for CSV. They convert dates, drop leading zeros, lock at 1M rows, and take half a minute to launch on a slow laptop. A purpose-built CSV viewer respects your data exactly as it is — and opens it the moment you click.

OpenCSV was built around three constraints: open instantly, never modify your data without permission, and work on the smallest devices. Everything in the app follows from those rules.

What it can do

• Open .csv files via drag-and-drop or file picker
• Render tables with 100,000+ rows smoothly
• Auto-detect headers, delimiters, and UTF-8 encoding
• Search across every cell instantly
• Save edits back as a clean CSV
• Generate read-only public share links
• Cloud-save files to access from any device

Who uses it

Built for speed

OpenCSV uses a streaming parser and a virtualised table renderer. Rows render as you scroll instead of all at once, so memory stays low and scrolling stays smooth even on phones. The whole UI weighs less than a single Excel splash screen.