CSV to Excel
Turn one or several CSV files into a single Excel workbook.
- Runs on your device — the file is never sent anywhere
- No sign-up, no watermarks, no daily quotas
- Free, with no limit on how often you use it
How it works
Opening a CSV in Excel works, but it is not the same as having a spreadsheet: the file has to be re-imported every time, the separator is guessed, and long numbers get mangled. Converting properly to XLSX fixes all three, and combining several CSVs into one workbook is the part that saves real time.
Several files, one workbook
Add a folder's worth of CSVs and each becomes a sheet, named after its file. That is the quickest way to turn a set of exports into something you can actually work with.
The separator is detected
Comma, semicolon and tab files are all recognised by looking at what appears most on the first line, so a European export with semicolons opens correctly without you having to say so. You can force a separator if a file is unusual.
Why this beats opening the CSV directly
Excel's own CSV import guesses at types and famously turns long identifiers into scientific notation and text like 1-2 into dates. Building a real XLSX puts the values in as values, so nothing is silently reinterpreted on the way in.
Sheet names
Taken from the file names, shortened to fit Excel's limit and stripped of the characters it does not allow. Duplicates get a number appended so nothing is silently overwritten.
CSV to Excel — questions
Can I combine several CSV files?
Yes. Each becomes its own sheet in one workbook.
Will it handle semicolon files?
Yes. The separator is detected automatically, and you can force it.
Does this stop Excel mangling long numbers?
It avoids the CSV import guessing, which is the usual cause. Values are written as values.
Are my files uploaded?
No. The workbook is built in your browser.