← Developer Tools
š
CSV to Excel Converter
Convert CSV files to Excel (XLSX) and Excel to CSV online. Paste CSV text or upload a file, preview the table, and download instantly. Free, no software needed, runs in browser.
š
Drop CSV file here or click to browse
Supports .csv and .txt files
Paste CSV Data
CSV to Excel FAQs
What is CSV format?
CSV (Comma-Separated Values) is a plain text format that stores tabular data. Each line is a row, and values are separated by delimiters (usually commas). It's widely used for data import/export between tools like Excel, Google Sheets, and databases.
How does the browser create an XLSX file?
The tool generates an XLSX file entirely in JavaScript using the Open XML format — no server upload is needed. The CSV is parsed, structured into an XML spreadsheet, packed into a ZIP container (which is what XLSX format is), and downloaded directly to your device.
My CSV uses semicolons instead of commas — will it work?
Yes! Select the correct delimiter from the dropdown (Comma, Tab, Semicolon, or Pipe). This is common in European locales where commas are used as decimal separators, so Excel exports often use semicolons instead.