CSV to Excel Converter
Paste CSV text or upload a .csv file -- download a clean .xlsx in seconds. Fully client-side: no data leaves your browser.
Delimiter is auto-detected (comma, semicolon, tab, pipe). Quoted fields with embedded commas are supported.
How to convert CSV to Excel
- Paste your CSV text into the box above, or click Upload file and choose a .csv file from your computer.
- Click Convert. The tool parses your CSV and previews the row count.
- Click Download .xlsx to save the Excel file.
- Open the file in Microsoft Excel, LibreOffice, or Numbers.
Open CSV in Excel without formatting issues
Opening a .csv directly in Excel often misreads columns -- Excel guesses the delimiter and may split fields incorrectly when data contains commas inside quoted strings. This converter produces a native .xlsx with columns already mapped, so the file opens cleanly with no import wizard needed.
CSV to XLSX -- frequently asked questions
- What delimiters are supported?
- The converter auto-detects comma, semicolon, tab, and pipe delimiters by counting occurrences in the first row. You do not need to specify the delimiter manually.
- Does it handle quoted fields with commas inside?
- Yes. Fields wrapped in double quotes (RFC 4180) are parsed correctly, including fields that contain commas, newlines, or escaped quotes ("").
- Is my data safe?
- Yes. Everything happens in your browser -- no file is uploaded to any server. Your data never leaves your device.
- How large a CSV file can I convert?
- The converter runs in the browser and handles typical files up to a few MB without issues. Very large files (hundreds of thousands of rows) may be slow depending on your device.
- Does the output preserve the header row?
- Yes. The first row of your CSV is treated as the column header and appears in the first row of the Excel sheet.