How it works
Upload a CSV file and the tool parses it — correctly handling quoted fields that contain commas or line breaks — then writes every row and column into a real Excel spreadsheet you can open in Excel, Google Sheets, or Numbers.
CSV to Excel
Convert a CSV file into an Excel (.xlsx) spreadsheet — no sign-up, no upload, no file size limit.
Drop a CSV file here, or click to browse
Your files never leave your device. Everything runs locally in your browser — nothing is uploaded to a server, so there's no file size limit, no subscription, and no one but you ever sees what's in your file.
Frequently asked questions
Is there a file size limit?+
No artificial limit — the conversion happens entirely on your own device, so there's no server-side cap. Very large CSVs (hundreds of thousands of rows) may take a few seconds and use more memory on an older device.
What delimiter does this handle?+
Comma-separated values, including fields wrapped in quotes that contain commas or line breaks. If your file uses a different delimiter (like semicolons or tabs), it may not split into columns correctly.
Does the first row become a header automatically?+
The first row of your CSV is placed as the first row of the spreadsheet as-is — this tool doesn't apply any special header formatting (bold, freeze pane, etc.), it just preserves your data faithfully.
Is my file uploaded anywhere?+
No. This tool runs entirely in your browser using JavaScript — your file is read, converted, and downloaded without ever being sent to a server.
Keep a backup of your original file. This tool processes everything locally in your browser, and we've tested it carefully — but no conversion tool handles every PDF perfectly. Always keep your original file and double-check important results before relying on them.