CSV Guides & Tutorials
Practical, step-by-step answers to the most common CSV problems. Every guide pairs with a free tool that runs privately in your browser.
How to Split a Large CSV File Without Excel
Excel chokes past 1,048,576 rows. Here is how to split any large CSV in seconds, free and offline.
How to Split a CSV by Column Value
Create one file per country, category or customer automatically from a single CSV.
How to Merge Multiple CSV Files Into One
Combine many CSV exports into a single clean file, even when columns differ.
How to Remove Duplicate Rows From a CSV
Clean duplicate contacts, orders or records from a CSV, by whole row or specific columns.
How to Convert CSV to JSON (and Back)
Turn spreadsheet exports into API-ready JSON in one click, no coding required.