Does this compute averages or sums?

No — it reports counts only, not numeric aggregates.

CSV Statistics

CSV Statistics reports the number of rows, columns, and unique values per column in a CSV file.

Click to upload a fileor drag and drop

Check a CSV file for inconsistent rows.

See row, column, and cell counts for a workbook.

Combine multiple PDF files into one document.

Split a PDF into individual single-page files.