DocomintConvert CSV to Excel (.xlsx) Online
A CSV file is just plain text — commas separating values, one row per line, nothing else. That makes it universal, but it also means it opens looking flat and unformatted, and a lot of tools (finance workflows, client deliverables, anything going to someone who lives in spreadsheets) really want a proper Excel workbook instead. CSV to Excel takes one or more CSV files and turns them into a real .xlsx workbook.
What actually changes between the formats
CSV has no concept of multiple sheets, cell formatting, column widths, or formulas — it's values and commas, period. Converting to Excel gives you an actual workbook structure: each CSV file you add becomes its own sheet, with proper columns your recipient can filter, sort, and format without first having to import and clean up a text file themselves.
Multiple CSVs, one workbook
A common situation: you've exported several related CSV reports — say, monthly transactions split by quarter — and want them as tabs in a single Excel file instead of four separate downloads. Add all of them at once and each becomes its own sheet in the resulting workbook, in the order you added them.
How to convert CSV to Excel
- Open CSV to Excel and add one or more CSV files.
- Each file becomes a sheet in a new workbook, built entirely on your device.
- Download the
.xlsxfile.
The conversion runs client-side — your CSV data, which is often financial or customer data, never gets uploaded anywhere to become a spreadsheet.
What doesn't carry over — and why
Only cell values move across. Since CSV has no native concept of formulas, cell formatting, merged cells, or charts, there's nothing to preserve in the first place — the Excel file you get is clean, correctly typed data with no formatting baggage, ready for you to format however the recipient actually needs.
Going the other direction
If you've got an existing Excel workbook and need the plain-text version instead — for importing into a system that only accepts CSV, or for a smaller, diffable file — use Excel to CSV, which extracts one CSV file per sheet.
Frequently asked questions
Are formulas and formatting preserved?
No — only cell values carry over. CSV has no concept of formulas or formatting, so converting in either direction keeps values only.
Can I combine multiple CSVs into one workbook?
Yes — add several CSV files at once and each becomes its own sheet in the resulting workbook, in the order you added them.
Is my data uploaded anywhere?
No — the conversion runs entirely in your browser, which matters for CSVs containing financial or customer data.
Is there a file size limit?
Free accounts can convert files up to 100MB total; Pro raises that to 500MB.
Can I convert an Excel file back to CSV?
Yes — use Excel to CSV to extract one CSV file per sheet from an existing workbook.