CSV to Excel converter
Turn CSV into a real .xlsx workbook as you type. Nothing is uploaded, and the result can be previewed as a table, copied or downloaded.
Loading the converter… It runs locally in your browser.
How to convert CSV to Excel
- Paste your CSV into the input panel, drop a file onto it, or press “Open file”.
- Adjust the options above the panels (delimiter, header row, alignment and so on).
- Check the result: switch the output to “Table” view to see it as a grid.
- Press “Copy” or “Download .xlsx”. The conversion runs on your device, so large files never leave it.
Excel often mangles CSV files you double-click: it strips leading zeros from ZIP codes and IDs, turns part numbers like 3-4 into dates, and guesses the delimiter from your system locale. Converting here writes a real .xlsx file where every cell is stored as text unless it is clearly a plain number, so 00742 stays 00742.
About CSV
Comma-separated values: one record per line, fields split by a delimiter, and fields that contain the delimiter, quotes or line breaks wrapped in double quotes (RFC 4180).
About Excel
Microsoft Excel workbooks (.xlsx, and legacy .xls). TableForge also reads OpenDocument .ods and data copied straight out of a spreadsheet.
Why some CSV fields get quotes
A CSV field only needs double quotes when it contains the delimiter, a double quote or a line break. A quote inside a field is written twice ("Katherine ""Kay"" Johnson"). Our interactive CSV format guide lets you type a value and watch exactly which rule applies.
Questions people ask
Is my CSV data uploaded anywhere?
No. The CSV to Excel conversion runs entirely in your browser with JavaScript. The page works offline once it has loaded, and TableForge never receives your data.
How large a file can I convert?
The limit is your device's memory. Files of tens of megabytes (hundreds of thousands of rows) convert fine on a typical laptop. The preview shows the first 200 rows, but the download always contains every row.
Does the converter keep special characters and commas?
Yes. Fields containing commas, quotes or line breaks are quoted and escaped according to each format's rules, and text is read and written as UTF-8, so accents, CJK characters and emoji survive.
Can I convert Excel back to CSV?
Yes, use the Excel to CSV converter at tableforge.io/excel-to-csv, or the universal converter on the home page.
Will Excel strip my leading zeros?
Not in this file. Only plain numbers without leading zeros are stored as numeric cells. Everything else (ZIP codes, phone numbers, IDs like 00123) is written as text, so Excel shows it exactly as it was.