XLS to CSV Converter

When you need CSV from XLS

XLS shows up often in old price lists, archives, exports from accounting systems, and files created before the shift to XLSX became widespread. While such a file opens as a spreadsheet you can work with it in an editor. But for loading data into a CRM, database, ad platform, marketplace, or script, you usually need CSV.

Converting XLS to CSV extracts cell values and saves them as a simple text file with delimiters. CSV is easier to import, verify, pass between systems, and process programmatically.

What is preserved in the CSV

CSV receives the table data: text, numbers, dates, and the current results of formulas. Formatting, colors, borders, column widths, charts, images, macros, comments, and interactive elements are not preserved. CSV is not a full Excel workbook - it is a flat data table.

If the XLS has multiple sheets, make sure in advance that the data you need is on the sheet that will be exported. For an editable modern spreadsheet use XLS to XLSX, and for an open office format use XLS to ODS.

What matters for import

CSV looks simple, but errors often surface after conversion. Dates can be read in a different locale, phone numbers and SKUs can lose leading zeros, long numbers can become scientific notation, and the delimiter may not match what the target system expects.

Before loading, check the header row, delimiter, encoding, date format, and columns containing identifiers. If the data comes from a modern Excel file, use XLSX to CSV. If you later need an Excel file from the CSV, use CSV to XLSX.

What it works well for

XLS to CSV works well for customer lists, product catalogs, price lists, orders, inventory levels, payments, registries, and reports where rows and columns are what matter. Complex financial models, dashboards, macro-dependent workbooks, and visual reports should not be converted to CSV without manual review, because logic and formatting will be lost.