Excel, Google Sheets & CSV

Free CSV tools for imports and cleanup

Check a separator or process CSV files in your browser. Preview the result before downloading. No account or file upload.

Paper spreadsheet columns inspected through a green magnifying glass.

CSV delimiter checker

Comma, semicolon, tab or pipe? Paste complete rows to find a likely separator and preview the fields, including quoted notes.

Check a separator
Two paper spreadsheets flowing into one table with aligned columns.

Merge CSV files online by column name

Combine exports under one header. Columns match by their exact names, so a different column order will not move values into the wrong fields.

Merge CSV files
Repeated paper rows lifted from a spreadsheet.

Remove CSV duplicates by selected columns

Choose which columns define a duplicate. Keep the first or last matching row without deleting cells from the middle of a record.

Remove duplicates
One paper spreadsheet divided into smaller sheets with matching headers.

Split CSV into smaller files with headers

Divide a CSV into smaller files by data-row count. Every part keeps the header, and a line break inside a quoted field stays with its record.

Split CSV

Need a file to try?

Browse the example files for synthetic datasets and the guides that explain the expected result.