FREE TOOL
Free CSV to Excel converter
Turn a CSV file into an Excel workbook (.xlsx) format.
Need your data as an Excel file?
A lot of people land here for a simple reason: someone asked for the data in Excel, but what they have is a CSV. Maybe you already tried opening it in Excel and some of the rows went missing, or the file was just too big to open at all.
This is the bridge between the two. Drop your CSV in and you get back a proper Excel file you can open, format, and share like any other spreadsheet. If the data is too big for one Excel sheet, it is spread neatly across a few sheets in the same file so nothing is left behind. There is no account to create, it is free, and your file never leaves your computer.
CSV vs Excel: what is the difference?
A CSV (comma-separated values) file is a plain-text table where commas separate the columns. It is lightweight and universal, which is why nearly every tool exports to it. An Excel workbook (.xlsx) is a richer format that holds things a CSV cannot: multiple sheets, formulas, formatting, cell types, and charts. People convert a CSV to Excel when they want to actually work with the numbers in a familiar spreadsheet, hand a tidy file to a colleague, or build formulas on top of the data.
Why convert here instead of opening it in Excel?
Excel can open a CSV, but only if it fits. A sheet tops out at 1,048,576 rows, so a large export is either truncated or bogs the program down before it finishes loading. This converter takes a different path. It builds the workbook straight onto your computer as it goes, so even multi-gigabyte files stay smooth instead of overwhelming your machine.
If your data runs past Excel's per-sheet row limit, it is spread across several sheets in the same workbook automatically, so nothing gets dropped. You get a clean .xlsx you can open and work with, built from a file that Excel could not have loaded directly.
How it works
Drop your CSV in and the tool works out how the file is laid out and counts the rows, with no upload. It builds the Excel file straight onto your computer as it goes rather than all at once, which is what lets it handle files far larger than Excel could open on its own. When it finishes, you download a single workbook, split across sheets if the row count calls for it.
Questions
Is my CSV uploaded to convert it?
No. The whole conversion happens inside your browser, and the Excel file is saved straight to your own computer as it is built. Your data never leaves your machine.
What happens to files larger than Excel’s row limit?
Excel allows 1,048,576 rows per sheet. Larger files are automatically spread across multiple sheets in a single workbook, so no rows are lost.
Is there a file size limit?
There is no fixed cap. Because the workbook is saved straight onto your computer as it goes rather than held all at once, the practical limit is your free disk space, which comfortably covers multi-gigabyte files.
Which delimiters are supported?
The tool auto-detects common delimiters (comma, semicolon, tab, and pipe) before converting.
Is the converter free?
Yes, completely free. No sign-up, no watermark, and nothing to install. It runs in your browser.
Other free CSV tools: the CSV viewer opens large files for a quick look, and the CSV splitter breaks oversized files into smaller parts.
Want to query this file instead?
Skip the export — Sifar Data handles multi-GB files natively in your browser.