Want to convert TXT file to JSON file?
Try Withdata Data File Converter, a desktop TXT to JSON converter for Windows, MacOS, and Linux, Convert TXT to JSON, 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 JSON
Choose TXT file -> Set JSON file -> Convert TXT to JSON
“Start a New Convert” for “TXT to JSON”.
Select From “File” “TXT” To “File” “JSON”.
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 JSON file.
3. Set rows options.
4. Convert TXT to JSON.
After converting, you can view the output JSON file.
More about TXT to JSON converter
Download Withdata DataFileConverter
See Video: Convert TXT file to JSON file
See also:
TXT → JSON reference
Type mapping
| Value kind | in TXT | in JSON |
|---|---|---|
| Int | 1234, or right-aligned in a fixed-width column | 1234 (number) |
| Decimal | 1234.56 | 1234.56 (number) |
| Float | 1.234e+10 | 1.234e10 (number) |
| Text | written as-is; padding depends on the chosen layout | "text" (string) |
| Long text | written as-is | "multi-line\ntext" (escaped newline inside a string) |
| Date | whatever the writer chose | "2026-09-18" (string) |
| Datetime | whatever the writer chose | "2026-09-18T14:30:00Z" (string) |
| Binary | not representable | "base64:..." (string) |
| Boolean | Y / N, or 1 / 0, or TRUE / FALSE | true / false (boolean) |
| JSON | written as-is | nested object or array, kept as structure |
Dialect differences
Both TXT and JSON are file formats, so what differs below is how each one chooses to represent a value.
| Property | in TXT | in JSON |
|---|---|---|
| identifiers | None by convention | Double quotes; backslash escapes |
| dates | Whatever the writer produced; no convention is guaranteed | No date type: dates arrive as strings and the reader must p... |
| binary | Not supported | Not supported natively - base64 inside a string |
| separator | Whatever was chosen - often fixed column widths | Braces and commas |
| encoding | No declaration - UTF-8 works only with a BOM | UTF-8 by definition |
| typing | None - every field is text | string, number, boolean, null, object, array - no date type |
| shape | Free form; a parser has to be told the layout | Nested objects and arrays |
| ceiling | No formal limit | Whole document is usually parsed into memory |
Convert TXT to JSON the easy way
Use the TXT to JSON converter — an offline desktop app for Windows, macOS and Linux. Nothing to upload, large files and batch runs supported (free trial).
