Don CSV

A small, native macOS CSV editor written in Swift and SwiftUI.

Requires macOS Tahoe 26 or later.

Run

Open Package.swift in Xcode and press Run, or use:

swift run DonCSV

Features

• Native, editable macOS table
• Open several CSV files at once in native tabs, with support for separate windows
• New files open in tabs by default; reopening an open file focuses its existing tab
• Columns start wide enough for their content and remain user-resizable
• Full-cell single-click targets with Numbers-style interaction: click to select, arrows/Tab to move, type to replace, double-click or Return to edit, and Escape to cancel
• Native alternating row stripes with a non-CSV row-number gutter
• Click a column header to alternate descending/ascending sort; click # to restore file order
• Right-click a column header to rename it, or select a cell and use the toolbar's Table Actions menu
• Right-click a cell for standard Copy, Paste, and Clear Contents actions
• Use the native right-hand Inspector to show or hide individual columns without changing the CSV
• Filter rows from the same sidebar by choosing a column and typing a case-insensitive search
• Tab and Shift-Tab move across visible columns and wrap naturally between rows
• Shift-click or Shift-arrow to select rectangular cell ranges
• Copy and paste selected ranges while preserving their row/column pattern
• Paste tab/newline spreadsheet data; a single value fills a larger selection
• Automatic saving after edits
• Open files stay live as external changes appear automatically, alongside in-app autosave
• Add and delete rows or columns
• CSV quoting, embedded commas, and multiline fields are preserved
• Drag-and-drop CSV opening
• Open CSV files directly from Finder
• Undo and redo edits, pastes, and row or column changes
• Reopen the last file and restore the window size on launch

The first CSV row is displayed exclusively as the editable table headings; data rows begin underneath it.