CSView
CSView is a specialised CSV and TSV file viewer optimised for inspecting extremely large datasets that would be impractical to open in spreadsheet applications. It handles files with hundreds of millions of rows and gigabytes of data while maintaining responsive performance through background indexing and memory-efficient design. The app supports customisable delimiters, multiple character encodings, full-text search, zoom, column resizing and keyboard navigation. It is read-only, designed specifically for safely viewing and exploring data exports, database queries, logs and scientific datasets without editing or transforming the original files.
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1 suggestionCSView 2 is available natively on Apple Silicon as a paid app on the Mac App Store (£1.99 or equivalent). The vendor has confirmed that the current version shipped to the App Store includes full native support for Apple Silicon Macs. If you have an older Intel-only build installed, simply open the Mac App Store, search for CSView 2, and download or update to the current version — the App Store will automatically serve the native build on Apple Silicon Macs. The new version also brings a modern high-performance indexing engine and improved rendering speed compared to the earlier 1.x releases.
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