How to use
Basic steps for using CSV Checker.
This page explains single-file check (validate one CSV) and compare two files (see differences between two CSVs).
Single-file check steps
- Open the check page
From the home page, click the single-file check card or go to the format check page. - Select a CSV
Drag and drop a file onto the «Select CSV» area or click to choose. Row limits are shown in the footer under «Current plan». - Review the results
Format, delimiter, encoding, header, empty rows, column mismatch, etc. are shown. - Choose columns (optional)
Check the columns you want in the table, then click «Show table». - View and download
Use the «Issues found» panel and «Download CSV», «To full-width» / «To half-width» as needed.
Compare two files steps
- Open the compare page
From the home page, click compare two files or go to compare page. - Select two CSVs
Put the reference CSV in «Current data» (left) and the file to compare in «Reference data» (right). - View the comparison
Added, deleted, and changed rows are colour-coded. Click the summary to list matching row numbers. - Columns and navigation
Use «Choose visible columns» to show or hide columns. Click a row number to scroll to that row.
General
- All processing happens in your browser; nothing is sent to our servers.
- We recommend the latest Chrome or Edge.
- Row limits are shown in the footer. Log in or subscribe for higher limits.