CSV to Excel — Open CSV Files in Properly Formatted Excel
Convert CSV files to XLSX spreadsheets with correct encoding, proper column detection, and data-type recognition. Fix the common issues that make CSVs look wrong in Excel.
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How to CSV to Excel
Upload your CSV file
Drag and drop your CSV. The tool detects the delimiter, encoding, and structure automatically.
Review and adjust
Preview the data in a spreadsheet grid. Adjust the delimiter, encoding, or column types if needed.
Download the Excel file
Get a properly formatted .XLSX file that opens cleanly in Excel, Google Sheets, or Numbers.
Why Choose Our CSV to Excel Converter?
Auto-Delimiter Detection
Automatically detects commas, tabs, semicolons, and other delimiters — no manual configuration required.
Encoding Detection
Identifies UTF-8, UTF-16, Latin-1, and other encodings to prevent garbled characters and mojibake.
Data Type Recognition
Detects numbers, dates, currencies, and text, applying the correct Excel formatting to each column.
Large File Support
Handles CSV files with hundreds of thousands of rows without truncating or slowing down.
What is CSV to Excel Converter?
Why Does CSV Look Wrong in Excel?
CSV (Comma-Separated Values) is the simplest possible spreadsheet format — it stores raw text with no metadata about formatting, data types, or encoding. When you open a CSV in Excel, the application must guess several things: what character separates columns, what character encoding the file uses, and what data type each cell contains. Excel's guesses are often wrong. It may interpret text as numbers (dropping leading zeros from zip codes and phone numbers), mangle non-English characters because it assumed the wrong encoding, or split a single column into multiple because the file uses semicolons instead of commas. A proper CSV-to-Excel converter eliminates these problems by detecting the correct settings before conversion.
How Our Converter Solves These Issues
Our converter inspects the file's first several kilobytes to determine the delimiter pattern and byte-order mark (BOM) that indicates encoding. It then parses the entire file using the correct parameters, preserving every value exactly as it appears. Data type detection is performed column by column — if every non-empty value in a column looks like a number, the column is typed as numeric. If values match date patterns, the column is formatted as dates. This means your converted spreadsheet works correctly the moment you open it, without needing to run Excel's Text Import Wizard or manually retype corrupted data.
CSV vs. XLSX
CSV stores only raw data — no formulas, no formatting, no multiple sheets, no charts. XLSX is a full-featured spreadsheet format that supports all of these. Converting CSV to XLSX gives you a foundation to add formatting, formulas, and analysis tools. It also preserves data types, so numbers stay as numbers and dates stay as dates rather than being treated as plain text.
- Database exports: convert SQL query results from CSV to Excel for pivot table analysis.
- Financial data: ensure leading zeros in account numbers are preserved as text, not converted to numbers.
- International data: correctly handle accented characters, CJK text, and special symbols.