CSV to Excel

1. Add your CSV. Choose a .csv file or paste your comma-separated data.
2. Convert. Click convert to build an Excel workbook.
3. Download. Your .xlsx file downloads automatically.

CSV to Excel turns a plain-text comma-separated file into a real .xlsx workbook that Excel, Google Sheets, and LibreOffice open without any import prompts. A CSV is just rows of text separated by commas (or semicolons or tabs), with no concept of sheets, column types, formatting, or formulas. This tool parses that text, splits each row into proper cells, and writes a genuine Office Open XML workbook so your data lands in tidy columns ready to sort, filter, and format the moment you open it.

Reach for it whenever you have raw exported data and want a spreadsheet you can actually work with. Common cases: a database or analytics platform exports CSV but your finance team needs an .xlsx to add formulas and a pivot table; you receive a contacts or product export and want to format it before sharing; or you simply want to stop double-clicking a CSV and watching Excel jam everything into column A. Converting first means the recipient gets clean, typed columns instead of a wall of text.

Under the hood the tool reads your file or pasted text, detects the delimiter (comma, semicolon, or tab), respects quoted fields so a value like "Smith, John" stays in one cell, and builds a single worksheet inside an .xlsx package. It handles embedded line breaks inside quotes and trims the stray empty trailing rows many exporters add. Because the output is a structured workbook rather than re-saved text, the column boundaries are locked in and won't shift based on a viewer's regional list-separator setting.

Everything runs in your browser using JavaScript, so the file is never uploaded to a server. That matters because CSVs often carry customer emails, order records, or financial figures, and a local conversion keeps that data on your machine. One caveat worth knowing: like any tool that produces a spreadsheet, the visual result still depends on Excel's own number handling. To guarantee that long IDs and codes survive intact, keep them as text rather than numbers (see the FAQ on leading zeros and scientific notation).