Want to convert TXT file to CSV file?
Try Withdata Data File Converter, a desktop TXT to CSV converter for Windows, MacOS, and Linux, Convert TXT to CSV, 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 TXT file(s) to online services.
- Support Windows, Linux, and macOS.
Download Withdata DataFileConverter 
Convert TXT to CSV
Choose TXT file -> Set CSV file -> Convert TXT to CSV
“Start a New Convert” for “TXT to CSV”.
Select From “File” “TXT” To “File” “CSV”.
1. Open source TXT file.
Support large TXT file ( > 4GB ).
Don’t worry about the delimiter, DataFileConverter will automatically determine the delimiter, includes comma, tab, colon, semicolon, pipe, hash (octothorpe), slash, asterisk, white space, and you can also enter a delimiter.
Source TXT file’s content is like this:
2. Config target CSV file.
3. Set rows options.
4. Convert TXT to CSV.
After converting, you can view the output CSV file.
More about TXT to CSV converter
Download Withdata DataFileConverter
See also:
TXT → CSV reference
Type mapping
| Value kind | in TXT | in CSV |
|---|---|---|
| Int | 1234, or right-aligned in a fixed-width column | 1234 |
| Text | written as-is; padding depends on the chosen layout | quoted only when it contains a comma or a quote |
| Long text | written as-is | must be quoted; line breaks inside force multi-line records |
| Date | whatever the writer chose | 2026-09-18 |
| Datetime | whatever the writer chose | 2026-09-18 14:30:00 |
| Binary | not representable | not representable - base64 or hex string |
| Boolean | Y / N, or 1 / 0, or TRUE / FALSE | TRUE / FALSE, or 1 / 0 depending on the writer |
| JSON | written as-is | the whole JSON value quoted, with internal quotes doubled |
Dialect differences
Both TXT and CSV are file formats, so what differs below is how each one chooses to represent a value.
| Property | in TXT | in CSV |
|---|---|---|
| identifiers | None by convention | Double quotes; a literal quote is doubled ("" ) |
| dates | Whatever the writer produced; no convention is guaranteed | Conventional text: 2026-09-18 or 2026-09-18 14:30:00 |
| separator | Whatever was chosen - often fixed column widths | Comma "," |
| shape | Free form; a parser has to be told the layout | Flat table, optional header row |
| ceiling | No formal limit | No formal limit; row count bounded by memory |
Convert TXT to CSV the easy way
Use the TXT to CSV converter — an offline desktop app for Windows, macOS and Linux. Nothing to upload, large files and batch runs supported (free trial).
