Komma — CSV editor for Mac

Open, edit and save CSVs directly.

US$14.99One-time purchase · No subscription

Request a full refund within 14 days (336 hours) of payment completion. Applicable taxes and your total are shown at checkout.

Actual Komma window editing a synthetic CSV with one million rows — Actual verification with a synthetic CSV: one million rows, ten columns.

Edit CSVs directly

Inspect and change CSV/TSV cells without converting to a spreadsheet workbook.

Inspect large tables

Editing, Undo, saving and reopening tested on a synthetic CSV with 1 million records, approximately 1 GB.

Your CSV stays on your Mac

CSV contents are not sent to a server. License activation uses an internet connection.

Fewer export steps

When a CSV needs a small correction, open it in Komma, edit and save directly. CSV/TSV viewing, cell editing, find and replace, and Undo/Redo are included. This is not a formula workbook or collaborative cloud spreadsheet.

Requirements and test scope

Designed for Macs with Apple Silicon. The current build targets macOS 26.2 or later and has been tested on macOS 27.0.1. Final system requirements will be listed before downloads begin.

Verified with a roughly 1GB synthetic CSV containing one million rows and ten columns on an M3 Pro Mac with 36GB memory. Editing, Undo, saving and reopening passed a comparison of every saved cell. Performance and memory use vary with the file and Mac.

After purchase

The intended flow is payment through Lemon Squeezy, followed by a download and license key. Enter the key in Komma’s License window.

One person, two Macs; perpetual use of purchased 1.x, including 1.x updates. Initial online activation, then up to 30 days offline from the last successful validation.