CSV to Excel ConverterSave a CSV as an .xlsx workbook.

Open a CSV or TSV file; its separator and column types are detected, so numbers and dates arrive in Excel as values, not text.
Filter, sort or summarise first if you like, then download the .xlsx.

Numbers stay numbersFilter before savingNo upload

No sign-up No upload No watermark

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Files are read and queried in this browser tab. Nothing is uploaded.

THREE SIMPLE STEPS

How to use the CSV to Excel

Open your CSV

Drop a .csv or .tsv file. The table appears with its column types.

Adjust if needed

Sort, filter, or summarise it with group by. The download follows what you see.

Download Excel

Save an .xlsx file with one sheet and a header row.

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CSV to Excel FAQ

Is my CSV uploaded?

No. It is converted in your browser tab and never leaves your device.

How many rows fit in Excel?

An Excel sheet holds 1,048,576 rows including the header. For more, filter or summarise first, or download Parquet or CSV instead.

Will leading zeros be lost?

A column such as 00123 is read as numbers when every value looks like a number. To keep the zeros, change its type in SQL: SELECT CAST(code AS VARCHAR) AS code, … and download that result.

Can I convert several CSVs?

Open them together; each is a table. Download each one, or combine them in SQL with UNION ALL first.

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