CSV to Excel Converter

Turn a CSV or TSV file into an Excel workbook with one worksheet, keeping ordinary numbers numeric and leading-zero codes as text.

  • Free, no watermark
  • No account needed
  • Nothing is uploaded

CSV XLSX

Runs in your browser

Drop your CSV files here

or

Google Drive import is not available yet. Choose a file from your device.

Accepts .csv, .tsv. Up to 100 MB per file, 20 files at a time.

At a glance

Accepts
.csv .tsv
Produces
XLSX
Files at once
Up to 20
Size limit
100 MB per file
Runs
In your browser

How it works

How to convert CSV to XLSX

  1. Add your CSV files

    Drag them onto the panel above, or press Choose Files. Accepts .csv, .tsv.

  2. Press Convert to XLSX

    Your browser does the work. A progress bar tracks it, and nothing is uploaded at any point.

  3. Download your XLSX files

    The result appears with its new size. Take the files one at a time or the whole set as a ZIP.

Skip the import wizard

Opening a CSV in Excel means arguing with the text import wizard about separators and encodings, and often watching leading zeros vanish and dates change format. A proper .xlsx file carries that information itself, so it opens the way it should the first time.

What the workbook contains

One sheet named after the file, the original header row, and ordinary numeric values stored as numbers. Automatic column sizing, bold headers and frozen panes are not added. Text that only looks numeric, such as a postcode or a product code with leading zeros, is kept as text.

CSV to XLSX: common questions

Which separators are supported?

Comma, semicolon and tab, detected from the file. Semicolon files exported by European versions of Excel are handled correctly.

Will accented characters survive?

Yes. The workbook is written as UTF-8 throughout, which avoids the mojibake you get when Excel guesses the encoding of a plain CSV.

Can I convert several CSVs into one workbook?

Each file becomes its own workbook. To combine them into one workbook with several sheets, convert them and then copy the sheets together in Excel.

Does it work with Google Sheets and Numbers?

Yes. The .xlsx format is read by Google Sheets, Apple Numbers and LibreOffice Calc as well as Excel itself.

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