CSV to Excel Converter.

Paste your CSV data or upload a .csv file into the input area above, then click Convert. The tool reads the CSV, maps each row to an Excel row with proper column formatting, and generates an .xlsx file you can download instantly. All processing is client-side — your data never leaves your device.

Upload your .xlsx or .xls file using the file upload area on the Excel to CSV page. The tool extracts data from the first sheet and converts it to CSV. Download the .csv file or copy the output.

In Excel: Data → From Text/CSV, select your .csv file, choose the delimiter (comma, tab, etc.), set the data type detection, and click Load. Use Power Query Editor (Transform Data) to clean or reshape before loading. For a quick conversion, use jsontofile.com to convert CSV to .xlsx and open it directly in any spreadsheet application.

Enter your data in Excel, then go to File → Save As and choose CSV (Comma delimited) (*.csv) from the format dropdown. Note: CSV only saves the active sheet and strips formatting, formulas (values only), and multiple sheets. For UTF-8 CSV, choose CSV UTF-8 (Comma delimited) to preserve special characters.

Double-click the .csv file (if Excel is your default), or open Excel and go to File → Open → browse to the file. If data appears in a single column, use Data → Text to Columns → Delimited → check Comma. For better control, use Data → From Text/CSV which opens Power Query with preview and data type detection.

File → Save As → choose a location, then select CSV (Comma delimited) (*.csv) from the Save as type dropdown. Click Save. Excel will warn that CSV only saves the active sheet — click OK. For UTF-8 encoding, choose CSV UTF-8. Note: formulas are replaced with their current values, and all formatting (colors, fonts, borders) is lost.

When opening a CSV in Excel, it strips leading zeros from numbers by default. To prevent this: use Data → From Text/CSV (not double-click), and in the Power Query preview, set the column's data type to Text before loading. Alternatively, format the column as text in the original CSV by wrapping values in quotes with an equals sign prefix: "=""01234""". For exporting, format cells as Text before saving as CSV.

Use the converter on this page — paste your CSV or upload the file, click Convert, and download the .xlsx. This is faster than Excel's import process and preserves your data exactly as-is. The resulting .xlsx file opens in any version of Excel, Google Sheets, or LibreOffice with proper column formatting.