ConverterCSV to Excel Converter
Turn a CSV table into an editable XLSX workbook in your browser. Upload a CSV file or paste the text, confirm the delimiter, inspect the parsed rows, and create one worksheet without sending the source data to a server.
Convert Your File
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Data preview
Supported Input
A .csv file or pasted delimited text up to 5 MiB.
Generated Output
One .xlsx workbook containing one worksheet.
What This Conversion Preserves
- Quoted fields, embedded delimiters, escaped quotes, line breaks, and Unicode text.
- Leading-zero identifiers when text-preservation mode is used.
- Plain numbers and booleans only when conservative type inference is enabled.
Important Format Limits
- CSV does not contain Excel formatting, formulas, charts, macros, or multiple sheets to restore.
- Dates remain text so regional date formats are not guessed.
- Formula-like strings are written as text and are not created as executable formulas.
Preview tables show at most the first 100 rows and 50 columns. The downloaded result contains all validated data unless a documented hard limit stops conversion before export.
A Practical Example
A semicolon-delimited customer export can be converted into one worksheet while account IDs such as 001204 remain text. Enable number inference only when numeric calculation is more important than preserving display formatting.
Browser Processing and File Safety
Conversion runs locally in a Web Worker so the interface can remain responsive while spreadsheet data is parsed. Converter247 does not send the selected file or pasted data to an API. Files stay in memory for the current page session and are released when you reset or leave the page.
Only XLSX workbooks are accepted for Excel input in this release. Workbook macros are not read or executed. Imported text is treated as data, including values that look like formulas. Large identifiers, leading-zero values, and high-precision numbers are preserved as text when exact numeric safety cannot be guaranteed.
Blank cells and unsupported workbook features are handled conservatively: the tool blocks unsafe over-limit inputs, reports formula cells without cached values, and avoids creating active formulas from CSV or JSON text.
Frequently Asked Questions
No. CSV contains plain tabular data, so the generated workbook starts without the original fonts, colors, formulas, charts, or macros.
It can suggest comma, semicolon, or tab based on the data, and you can override that choice before conversion.
The default preserve-text mode keeps values such as 00125 as text. Strict number inference also avoids converting integer strings with leading zeros.
Yes, when the line break is inside a correctly quoted field. The parser keeps it within the same cell.
One worksheet is created from each conversion. CSV itself has no multi-sheet structure.
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