Convert an old Excel file (.xls) to CSV locally - each sheet separately, no upload.
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Running locally on your device ...
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No re-upload neededThese tools accept .CSV - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Old .xls exports from retired point-of-sale systems, payroll tools or archived folders usually cannot be fed directly into modern analysis scripts, database importers or statistics software - most tools today expect plain CSV instead of the binary BIFF format. This tool reads the .xls workbook in your browser and writes each sheet out as its own CSV file.
Every cell is written with exactly the text the source application displayed - a percentage comes out as "12.5%", not as the raw fraction. With several sheets, the tool automatically bundles all the CSVs into one ZIP archive, so a single download is enough.
Plainly stated: CSV has no concept of formulas, formatting or charts - a formula becomes its last calculated result, fonts and colours drop away entirely. For carrying plain data on into another system, that is exactly the right reduction.
| Input formats | XLS |
|---|---|
| Output format | CSV |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Each sheet lands as its own plain-values CSV; formulas become their last result. Font styling, charts and macros from the .xls file are necessarily lost in the process. Encrypted, password-protected .xls files are not read.
No. The conversion runs entirely locally in your browser - nothing is sent anywhere.
Each sheet becomes its own CSV; you get them all bundled as a ZIP.
CSV stores values only - formulas become their computed result.
No, an encrypted file is rejected with a clear message. Remove the password in the source application first.
XLS to XLSX · ODS to CSV · ODS to XLSX · XLSX to CSV · Split CSV · Split XLSX