Paste your CSV data below and get a formatted Excel file in seconds. Everything runs in your browser � your data never leaves your device.
Excel preview will appear here...Paste CSV to see Excel preview
Convert any CSV file to a formatted Excel spreadsheet in three simple steps.
Paste your CSV data directly or upload a .csv file from your computer.
Set sheet name, toggle bold headers, and enable auto column width.
Download your formatted .xlsx file or copy the CSV data to your clipboard.
A CSV to Excel Converter is a utility that transforms comma-separated value (CSV) data into a formatted Microsoft Excel spreadsheet (.xlsx). Instead of plain-text comma-delimited data, you get a proper spreadsheet with formatted cells, auto-sized columns, and styled headers.
This is essential when you need to share data with colleagues who prefer Excel, create formatted reports from CSV exports, apply formulas and charts to raw data, or import CSV data into Excel-compatible workflows.
Formatted Excel output
Generate proper .xlsx files with styled headers and auto-sized columns.
Client-side processing
Your data never leaves your browser. No uploads, no servers involved.
Instant conversion
Convert thousands of rows in milliseconds with no lag.
Custom sheet names
Name your worksheet anything you like for better organization.
The output is a standard .xlsx file (Office Open XML Spreadsheet). It is compatible with Microsoft Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application that supports the xlsx format.
When enabled, each column is automatically sized to fit its widest content. This prevents data from being cut off and eliminates the need to manually resize columns in Excel.
Yes. The converter handles thousands of rows efficiently since all processing happens in your browser. However, extremely large files (100MB+) may slow down your browser due to memory constraints.
No. All conversion happens entirely in your browser using JavaScript. Your data is never sent to any server. You can verify this by disconnecting from the internet and using the tool offline.
The converter supports standard CSV with comma delimiters, quoted fields (including escaped quotes), Windows and Unix line endings, and fields containing newlines. Tab-separated values (TSV) are also supported.
For a complete CSV workflow, explore our other free tools:
All processing happens in your browser. Your data never leaves your device.