Want to convert CSV file to Excel file?
Try Withdata Data File Converter, a desktop CSV to Excel converter for Windows, MacOS, and Linux, Convert CSV to Excel, Easy and Fast.
- Can run in GUI mode, Step by Step, just a few mouse clicks.
- Can run in Command line, for Scheduled Tasks and Streams.
- Convert files locally and privately, avoid uploading large CSV file(s) to online services.
- Support Windows, Linux, and macOS.
Download Withdata DataFileConverter 
Convert CSV to Excel
Choose CSV file -> Set Excel file -> Convert CSV to Excel
“Start a New Convert” for “CSV to Excel”.
Select From “File” “CSV” To “File” “Excel”.
1. Open source CSV file.
Support large CSV file ( > 4GB ).
Source CSV file’s content is like this:
2. Config target Excel file.
3. Set rows options.
4. Convert CSV to Excel.
After converting, you can view the output Excel file.
More about CSV to Excel converter
Download Withdata DataFileConverter
See also:
CSV → EXCEL reference
Type mapping
| Value kind | in CSV | in EXCEL |
|---|---|---|
| Int | 1234 | 1234 (a real numeric cell) |
| Bigint | 9007199254740993 | 9007199254740993 (exact only while the cell stays text) |
| Decimal | 1234.56 | 1234.56 (numeric cell, format controls the displayed decimals) |
| Float | 1.234e+10 | 1.234E+10 (numeric cell) |
| Text | quoted only when it contains a comma or a quote | text cell; leading zeros survive only if the column is text |
| Long text | must be quoted; line breaks inside force multi-line records | text cell; wraps inside the cell rather than the row |
| Date | 2026-09-18 | a serial number plus a date cell format |
| Datetime | 2026-09-18 14:30:00 | a serial number plus a date-time cell format |
| Binary | not representable - base64 or hex string | not representable as data |
| Boolean | TRUE / FALSE, or 1 / 0 depending on the writer | TRUE / FALSE (a real boolean cell) |
| JSON | the whole JSON value quoted, with internal quotes doubled | a text cell; the quotes are part of the value |
Dialect differences
Both CSV and EXCEL are file formats, so what differs below is how each one chooses to represent a value.
| Property | in CSV | in EXCEL |
|---|---|---|
| identifiers | Double quotes; a literal quote is doubled ("" ) | Not applicable; a cell holds exactly one value |
| dates | Conventional text: 2026-09-18 or 2026-09-18 14:30:00 | Stored as a serial number; only the cell format makes it lo... |
| binary | Not supported | Only as text or an embedded object, not as a data column |
| separator | Comma "," | Cells, not delimiters |
| encoding | No declaration - UTF-8 works only with a BOM | UTF-8 internally, declared in the package |
| typing | None - every field is text | Real cell types: text, number, date, boolean, error |
| shape | Flat table, optional header row | Multiple sheets, each a flat grid |
| ceiling | No formal limit; row count bounded by memory | 1,048,576 rows x 16,384 columns per sheet; 255 sheets per w... |
Convert CSV to Excel the easy way
Use the CSV to Excel converter — an offline desktop app for Windows, macOS and Linux. Nothing to upload, large files and batch runs supported (free trial).
