Convert a CSV file into a proper Excel workbook, instantly. 100% free, no sign-up — nothing ever leaves this browser tab.
CSV to Excel takes a plain CSV file and turns it into a real .xlsx workbook you can open directly in Excel, Google Sheets, or any spreadsheet app. It runs locally using the SheetJS library, so your data never leaves this browser tab.
CSV files are great for moving data between systems, but they lose all spreadsheet formatting and aren't as convenient to browse or share as a proper workbook. This tool bridges that gap in one click, turning a raw CSV export into a file that opens cleanly with column widths and a proper sheet.
No installs, no accounts — just your browser doing the work.
Scroll up (or tap the button above) to load the tool instantly — no account or install needed.
Add your file, text, or numbers into the tool above.
Sensible defaults are already selected — tweak anything you need.
Your result is generated locally and ready in seconds — no waiting room.
Your data lands in a proper worksheet grid, ready to format.
Your CSV is read directly in this browser tab and never uploaded.
No server queue — the workbook is built the moment you drop the file.
Because CSV to Excel runs locally, teams handling sensitive data — finance, HR, legal, operations — can use it without the compliance questions that come with uploading documents to a third-party server.
Yes, though very large files (100k+ rows) may take a few seconds to process since everything runs in your browser.
Comma-separated values by default, which covers the vast majority of CSV exports.
No. CSV to Excel runs entirely in your browser using the SheetJS library.