📊 .CSV .XLSX

Convert CSV to XLSX
Online — Free

Convert your CSV files to XLSX (Excel) format online for free with FileShiftr. Instantly transform your data between formats. Perfect for developers and data analysts.

Premium feature — $9/month

Convert CSV to XLSX Now Browse All Conversions

📊

What is CSV?

.csv format

CSV (Comma-Separated Values) is a lightweight text format for storing tabular data, compatible with virtually any tool.

What is XLSX (Excel)?

.xlsx format

XLSX is Microsoft Excel's spreadsheet format for organizing and analyzing tabular data.

How to Convert CSV to XLSX

Three simple steps. No software to install, no registration required for basic conversions.

Upload Your File

Drag and drop your .csv file or click to browse. Max file size: 1 MB (free) or 3 MB (premium).

Select XLSX Format

Choose XLSX as the output format. The converter will process your file automatically.

Download Result

Your converted .xlsx file is ready in seconds. Click download and you're done.

Why Use FileShiftr for CSV to XLSX?

Lightning Fast

Most conversions complete in seconds, not minutes.

Secure & Private

Your files are processed securely and automatically deleted after conversion.

Works Everywhere

No software to install. Convert files from any device with a web browser.

REST API Available

Automate conversions with our developer-friendly API. Perfect for AI agents and workflows.

When to Convert CSV to XLSX

Common use cases for CSV to XLSX (Excel) conversion.

Transform data between formats for different tools and APIs.

Convert configuration files between popular formats.

Prepare data exports for import into other applications.

Automate with the REST API

Convert CSV to XLSX programmatically with a single API call.

terminal

curl -X POST https://fileshiftr.io/api/v1/convert/ \
  -H "X-API-Key: cvt_your_key" \
  -F "file=@input.csv" \
  -F "output_format=xlsx"

Frequently Asked Questions

How do I convert CSV to XLSX (Excel)?

Click the "Convert CSV to XLSX Now" button above, upload your CSV file, and download the converted XLSX (Excel) file. The entire process takes just seconds.

Is the CSV to XLSX (Excel) conversion free?

The CSV to XLSX (Excel) conversion requires a Premium subscription ($9/month). Premium includes higher file size limits and unlimited daily conversions.

Are my files kept after conversion?

No. Your uploaded files and converted output are automatically deleted after processing. We do not store or share your data.

Can I automate this conversion via API?

Absolutely. FileShiftr provides a REST API that lets you convert files programmatically. Sign up for a free API key and send a POST request to /api/v1/convert/ with your file.

Convert CSV to XLSX Online — Free