Loper · Data, research & smart home
Open .csv files on your Mac.
.csv .tsv
Every column in its own color, so you can follow a value down a long table.
Loper is a free, minimal editor for macOS that opens CSV & TSV tables instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.
Show the file as text
date,sample,temperature_c,ph,notes2026-10-20,A1,21.4,7.02,baseline2026-10-21,A1,21.9,6.98,2026-10-22,A2,22.1,7.11,"after calibration, retest"How to open .csv files
- Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
- Double-click your .csv file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
- Want every .csv file to open in Loper? Choose Loper › Make Loper the Default Editor….