Convert CSV to Excel Online

Convert Comma-Separated Values (.csv) files to Microsoft Excel (.xlsx) format online for free. Fast, secure, and no sign-up required. Your files are automatically deleted within 1 hour.

Free online csv to excel converter — no software needed. Instantly change, transform, and export your files in seconds.

CSVXLSX

Drag & drop your file here

or browse to select — accepts .csv (max 10MB)

How to Convert CSV to Excel Online

1. Upload Your File

Select or drag your .csv file into the converter

2. Convert Instantly

Your file is converted from .csv to .xlsx in seconds

3. Download Result

Download your converted .xlsx file to any device

Best Free CSV to Excel Converter

Lightning Fast Conversion

Convert .csv to .xlsx in seconds. No waiting, no queues — instant processing.

100% Secure & Private

All files are encrypted in transit via HTTPS and auto-deleted within 1 hour. Your data stays private.

Works on Any Device

Browser-based converter — works on Windows, Mac, Linux, iOS, Android, and Chromebook. No installation needed.

No Sign-Up Required

Start converting immediately. No registration, no email, no watermarks on your converted files.

When to Convert CSV to Excel

Sharing & collaboration

Send csv files to people who only have excel-compatible software, without losing layout or formatting.

Cross-platform compatibility

Open and edit your csv file on devices that don't support it natively by converting to excel once.

CSV vs Excel — Why Convert?

CSV (CSV)

Standard CSV file format
Widely used across platforms
CSV files may have specific features
May require specific software to open

XLSX (Excel)

Excel format for broader compatibility
Easy to share and distribute
Supported by many applications
Ideal for your target workflow

CSV to Excel — Frequently Asked Questions

Is CSV to Excel conversion free?

Yes! Reformat offers free CSV to Excel conversion. Free users get 3 conversions per day. Upgrade to Pro for unlimited conversions.

How do I convert .csv to .xlsx?

Simply upload your CSV file, click Convert, and download your Excel spreadsheet. The entire process takes just seconds.

What is the maximum file size?

Free users can convert files up to 10MB. Pro users get up to 100MB, and Business users get up to 500MB.

Is my file safe?

Absolutely. All files are processed securely and automatically deleted from our servers within 1 hour. We never access or share your data.

Can I convert multiple files at once?

With a Pro or Business account you can batch convert multiple files. Free users can convert one file at a time.

Is the CSV to Excel converter free?

Yes. Anonymous users get 5 free conversions per day; signed-in users get 10/day plus 2 AI uses. Pro removes the daily limit and raises the file-size cap.

What is the maximum file size for CSV to Excel?

Free users can upload files up to 10MB. Pro raises this to 100MB and Business to 500MB.

Is it safe to upload my csv file?

Files are uploaded over HTTPS, processed on our servers, and deleted within 1 hour. We do not read, share, or train on file contents.