Batch convert CSV files to Excel files

Shiji Pan

1 year ago

Want to batch convert CSV files to Excel files?

Try Withdata Data File Converter, a desktop CSV to Excel converter for Windows, MacOS, and Linux, Batch 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.

Click “Start a New Convert” at task dialog.

then show the wizard.

Select From “Files” “CSV” To “Files” “Excel”.

And config the first source CSV file.

List source CSV files.

After converting, you can view output Excel files.

CSV → EXCEL reference

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`

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...`

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