A fast, native macOS viewer and editor for CSV files — opens multi-gigabyte files in seconds with virtualized rendering and in-place editing.
Download
Grab csvViewer.dmg below, open it, and drag CSV Viewer to your Applications folder.
How to open the app
CSV Viewer isn't signed with an Apple Developer ID, so macOS blocks it on first launch. To open it (you only need to do this once):
- In Applications, right-click (or Control-click) CSV Viewer → Open → Open.
- If that's blocked on newer macOS: open System Settings → Privacy & Security, scroll down, and click Open Anyway.
- Terminal fallback:
/usr/bin/xattr -dr com.apple.quarantine "/Applications/CSV Viewer.app"
Highlights
- Opens huge files in seconds via a streaming byte-offset index (only the visible rows are read).
- In-place cell editing; add/remove/reorder rows and columns; undo/redo.
- Advanced search: global case-sensitive/regex search plus an AND/OR per-column filter panel.
- Find & replace, sort, and filter across the whole file.
- Auto-detects delimiter (comma/tab/semicolon/pipe) and encoding (UTF-8/UTF-16/Windows-1252), preserved on save.
- Atomic, overlay-based saves that never mutate the original file in place.