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CSV to Excel (XLSX)

Convert a CSV file into a clean Excel (XLSX) spreadsheet.

Accepted

CSV, XLS

Limit

1 file · up to 10 MB

Result

CSV → XLSX

Handling

Auto cleanup after 1h

Usage

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Max file size: 10MB

Max files per run: 1

Supported formats: CSV

Upload exactly one CSV file, up to 10MB. It will be converted into an Excel (XLSX) file.

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Files are uploaded and processed in the background. You will see links and previews when the run is finished.

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PDF compression summary

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CSV processing summary

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Output rows

Output files

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Output size

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How it works

1

Upload your CSV file

Select a comma-separated or semicolon-separated CSV file. The first row is treated as the header row.

2

Rows and columns are parsed

The CSV is parsed and each column is mapped to a named Excel column. Numeric values are detected and stored as numbers, not text strings.

3

XLSX file is generated

An Excel-compatible .xlsx file is created with your data structured in Sheet 1. Headers are placed in row 1.

4

Download and open in Excel

Download the .xlsx file and open it directly in Microsoft Excel, Google Sheets, or LibreOffice Calc.

🔗 Related tools 4 related tools

Excel Viewer

Upload an Excel file to inspect workbook metadata such as sheet names and counts.

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Excel (XLSX) to CSV

Convert an Excel (XLSX) file into a UTF-8 CSV file.

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Merge CSV Files

Merge multiple CSV files with the same columns into a single CSV.

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Split CSV File

Split a large CSV into multiple smaller CSV files with the same header.

Explore →

About CSV to Excel (XLSX)

CSV files are the universal export format for databases, analytics platforms, and CRMs, but they are difficult to navigate when opened raw in Excel: column widths collapse, filters are unavailable, and formulas cannot reference headers by name. Converting a CSV to XLSX gives recipients a structured spreadsheet with defined columns, header row recognition, and full support for sorting, filtering, and pivot tables. This converter parses the CSV, treats the first row as the header, and outputs a clean .xlsx file compa...

→ Convert a CRM export from CSV to XLSX before sharing it with a manager who works in Excel. → Transform a raw analytics data dump into a spreadsheet for filtering, pivoting, and charting. → Prepare a CSV product catalog for import review by converting it to a structured XLSX file. → Convert a database export to XLSX so a non-technical recipient can open and navigate it without errors.

Related guides and workflows

Guide

Open Excel Files Online Without Excel

Open XLSX, XLS or CSV files online and inspect spreadsheet sheets, rows and cells in a read-only browser viewer without installing Excel.

Guide

How to Use Clean CSV File Online

Learn how to use Clean CSV File online. Clean a CSV by trimming spaces, removing empty rows, and optionally deduplicating rows.

Guide

How to Use CSV to Excel (XLSX) Online

Learn how to use CSV to Excel (XLSX) online. Convert a CSV file into a clean Excel (XLSX) spreadsheet.

📦 Supported formats 1 file types

CSV → XLSX

❓ Frequently asked questions 4 answers

Both comma-separated and semicolon-separated CSV files are supported. If your file uses an unusual delimiter, clean it first using the Clean CSV tool.

No. CSV files store plain values, not formulas. Any formula text in the CSV will be stored as a string in the Excel output, not executed as a formula.

Yes. The first row of the CSV is treated as column headers and placed in row 1 of the Excel output. All subsequent rows are treated as data.

Free accounts support CSV files up to 10 MB. Pro accounts extend this for larger exports. Very large CSVs with hundreds of thousands of rows may take a few extra seconds.