File Convert

Convert CSV to XLSX

Free online CSV-to-XLSX converter — upload a CSV file and download a XLSX. Fast, private, no signup.

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CSV vs XLSX

CSV

Comma-separated values; the universal tabular interchange.

About CSV ↗

XLSX

Office Open XML spreadsheet (Excel).

About XLSX ↗

CSV to XLSX: frequently asked questions

How do I convert CSV to XLSX?

Drop your CSV file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a XLSX to download. No software to install.

Is the CSV to XLSX converter free?

Yes. Convert CSV to XLSX for free right in your browser, with no account needed to get started.

Is it safe and private?

Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.

What's the difference between CSV and XLSX?

Comma-separated values; the universal tabular interchange. Office Open XML spreadsheet (Excel).

Related conversions

Convert CSV to: ODS · TSV · PDF · JSON · HTML · YAML · PARQUET · AVRO · NDJSON · ORC

Convert to XLSX from: AVRO · JSON · NDJSON · ORC · PARQUET · XML · YAML · PDF · ODS · TSV

Browse all supported formats →