CSV guides

Everything worth knowing about opening and reading CSV files — written for the moment you have one in front of you and need it to make sense.

How to view a CSV file

Every practical way to open a .csv — browser, spreadsheet, terminal, phone — and which of them change your data on the way in.

What Excel silently rewrites when it opens a CSV, six alternatives that do not, and how to import safely if you must.

Opening files with millions of rows: browser viewers with no row cap, sampling, splitting and querying with DuckDB.

Open a .csv on iOS with no app installed — from Mail, Files or iCloud — and add the viewer to your Home Screen.

Android and iPhone, from attachments, Drive and Dropbox — plus how to read a wide table on a small screen.