Convert CSV to XLSX

Convert CSV data files to Excel XLSX for formatting, filters, and spreadsheet workflows.

Open full converter — Spreadsheet Converter

Long conversions: leave and come back

You can leave, close, or refresh this page while converting — the job keeps running on the server.
If the server is busy, your job waits in a queue and shows its position.
After the conversion finishes, you have about 1 hour to download the file.
Come back in the same browser on this device so we can find your job.
To stop this task and choose another file, use “Cancel and upload again” in the progress box.

Free CSV to XLSX converter

AnyConv365 helps you convert CSV files to XLSX without installing software. Open this page, choose your file, and download the result.

CSV is the lingua franca for imports and scripts. Export from Excel when a pipeline needs plain rows; convert back to XLSX when you need filters and formatting again.

Convert CSV to TSV for Unix tools and legacy importers

How it works

Is CSV to XLSX conversion free?

Yes. AnyConv365 lets you convert CSV to XLSX online for free with no account required.

Will my file quality be preserved?

We aim for the best practical fidelity for each pair. Preview the download before sharing when quality is critical.

Do you store my files?

Server-side source files are deleted immediately after a successful conversion. If conversion fails, the source file is retained for up to one hour for error diagnosis and then deleted automatically.

Do CSV files keep Excel formulas?

No. CSV stores values only. Keep an XLSX/ODS copy when calculations still matter.

Will CSV to XLSX detect column types?

Values are imported as spreadsheet cells. Formulas are not created automatically from CSV text.

Where can I learn more about this conversion?

See our guide: Convert CSV to TSV for Unix tools and legacy importers. It covers when to convert, common pitfalls, and related formats.

Related conversions

Related guides

Convert CSV to TSV for Unix tools and legacy importers
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Convert TSV to CSV for spreadsheet and import tools
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Convert TSV to XLSX for Excel formulas and charts
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