CSVtoExcel

CSVtoExcel is a free browser tool that turns CSV files into real .xlsx workbooks. It’s aimed at anyone who needs a quick fix for common CSV annoyances like garbled text, mis-split columns, lost leading zeros, long numbers shown in scientific notation, or Excel applying the wrong cell formats.

The converter recognises several encodings and can detect typical delimiters so you don’t have to guess settings. It runs in your browser, doesn’t ask you to sign up, and shows a preview before you download the resulting spreadsheet.

• Supports encodings: UTF-8, UTF-16, Shift-JIS, GBK
• Detects delimiters such as commas, tabs and semicolons
• Browser-based, no login required, preview before download
• Processes files locally in the browser, no upload to the server

Official site: https://csv2sheet.com/