Convert CSV to Excel
Any CSV — any encoding, any delimiter — as a spreadsheet with real dates and numbers.
How it works
Your file is opened in an isolated sandbox with no internet access, processed, and the sandbox is destroyed. Nothing is stored, and no account is needed.
It uses the same reader as the full product, which is built for the spreadsheets people actually have: headers that are not on row 1, merged cells, totals rows pasted at the bottom, dates in two formats, and numbers stored as text. Everything it changes is listed back to you.
Common questions
How do I convert a CSV file to Excel?
Upload the CSV and download the .xlsx. The header row is found even when it is not row 1, dates become real Excel dates and amounts become numbers you can add up.
Why does my CSV open in Excel as one column?
The file uses a semicolon or a tab instead of a comma, or it was saved as UTF-16. The converter detects both and splits the columns correctly.
Why do my dates or leading zeros change when I open a CSV in Excel?
Excel guesses each value as it opens the file. The converter reads the whole column first and applies one reading to it, and says which date order it chose when the column is ambiguous.
Does it keep accented characters?
Yes. UTF-8 and UTF-16 files keep their characters, including the ones Excel shows as garbled when it opens a CSV directly.