CSV to Excel Converter

Free CSV to Excel Converter

CSV to Excel Converter transforms comma-separated value files into properly formatted Excel spreadsheets (.xlsx) directly in your browser. Upload a CSV file, drag and drop it onto the workspace, or paste CSV text from your clipboard to get started. The tool auto-detects whether your data uses commas, semicolons, tabs, or pipes as delimiters, then parses every row and column into a structured table preview. Click the download button and receive a ready-to-use .xlsx file that opens in Microsoft Excel, Google Sheets, LibreOffice Calc, and every major spreadsheet application.

Online CSV to Excel Converter with Data Preview and Auto-Detection

Skip the hassle of manually importing files or adjusting column separators in your spreadsheet application. This online converter simplifies the process: drop your file, preview the results in a formatted table, and download your Excel file in one click. Use the preview table to check row numbers and column headers for accuracy before you save your finished spreadsheet.

Upload CSV Files or Paste Data

Choose the input method that fits your workflow. You can select a .csv, .tsv, or .txt file from your computer using the upload button, or simply drag and drop any file directly onto the workspace. If you prefer, copy your CSV data from another application and paste it into the converter for immediate results. Your data is parsed and displayed in a table preview regardless of how you choose to load it.

Automatic Delimiter Detection

CSV files vary by region and application, often using different delimiters like semicolons for European exports or pipes for database dumps. The auto-detect feature takes the guesswork out of formatting by analyzing your data and choosing the correct delimiter for you. If the auto-detection isn't quite right, you can easily override it using the toolbar dropdown.

How the Conversion Works

This tool builds a valid .xlsx file directly in your browser using secure client-side JavaScript. By constructing the Open XML Spreadsheet format, it ensures your files work natively with Excel, Google Sheets, and LibreOffice. Numeric values are stored as actual numbers to keep your formulas and sorting intact, while text values are safely escaped to handle any special characters in your data.

Custom Sheet Names

While the default sheet name is "Sheet1," you can customize it to anything you like using the toolbar input. This feature is perfect for staying organized when sharing files or merging data into larger workbooks with multiple tabs. Your chosen name will appear right on the sheet tab when you open the file in Excel.

No File Size Limits

Since all processing happens locally on your computer, you won't run into server-imposed file size limits. Even files containing thousands of rows convert in seconds on modern hardware. While the preview table shows the first 100 rows to keep the interface fast, every single row is included in your final .xlsx download.

Your Data Stays Private

Your privacy is built into the conversion process. Every step runs locally using client-side JavaScript, meaning your CSV file is read, parsed, and assembled into an Excel file without ever leaving your device. Your data is never transmitted to a server, and you don't need an account to get started. Once you close the browser tab, your data is completely cleared from memory.

Related CSV and Spreadsheet Tools

If you work with CSV files regularly, these tools cover additional conversion and validation tasks:

• CSV Tools -- convert CSV to JSON, TSV, HTML tables, Markdown, and SQL
• JSON Formatter -- format, minify, validate, and transform JSON data
• JSON to CSV -- convert JSON arrays to CSV format
• HTML Formatter -- format and beautify HTML documents
• SQL Formatter -- format and beautify SQL queries
• Base64 Decode -- decode Base64 encoded data