Convert CSV to XLS
Convert CSV to legacy Excel format (.xls) for compatibility with older versions of Microsoft Excel. Download your converted XLS file online.
Drop your CSV files here
Up to 50MB per file.
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your CSV files
Drag and drop or select CSV files from your device. You can upload multiple files at once.
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Configure Output
Start the conversion. Crest Convert will prepare the XLS file using the appropriate format engine.
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Download XLS files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert CSV to XLS?
CSV is a simple tabular data format used by spreadsheets, databases, and data tools. Converting it to XLS creates the legacy Microsoft Excel workbook format used by older spreadsheet systems, ready for workflows that use the destination format.
XLS opens in Microsoft Excel and office suites that support legacy workbooks.
Frequently Asked Questions
What does converting CSV to XLS do?
It creates a genuine XLS file from your CSV. CSV is a simple tabular data format used by spreadsheets, databases, and data tools, while XLS is the legacy Microsoft Excel workbook format used by older spreadsheet systems. The result is ready for workflows that use the destination format.
What is retained in the CSV to XLS conversion?
Records and values from CSV are arranged into spreadsheet rows and columns in XLS, making the result convenient to sort, filter, calculate, and review.
Which apps can open the converted XLS file?
XLS opens in Microsoft Excel and office suites that support legacy workbooks.
Does CSV to XLS run in my browser?
CSV to XLS uses a compatible conversion engine on our server. The file is transferred over an encrypted connection, processed securely, and automatically deleted shortly after conversion.
Can I batch convert CSV files to XLS?
Yes. Add multiple CSV files, convert them together, and download each XLS result separately or collect the completed batch in a ZIP file.
What is the CSV to XLS file size limit?
CSV files can currently be up to 50MB.