Want to batch convert JSON files to CSV files?
Try Withdata Data File Converter, a desktop JSON to CSV converter for Windows, MacOS, and Linux, Batch convert JSON 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 JSON file(s) to online services.
- Support Windows, Linux, and macOS.
Batch convert JSON files to CSV files
Select source JSON files -> Set CSV files -> Convert JSON files to CSV files
Click “Start a New Convert” at task dialog.
then show the wizard.
Select From “Files” “JSON” To “Files” “CSV”.
1. Select source JSON files.
And config the first source JSON file.
2. Config target CSV files.
3. Summary.
List source JSON files.
4. Convert JSON files to CSV files, 1 JSON to 1 CSV.
After converting, you can view output CSV files.
More about JSON to CSV converter
Download Withdata DataFileConverter
See Video: Bulk convert JSON files to CSV files without coding
See also:
JSON → CSV reference
Type mapping
| Value kind | in JSON | in CSV |
|---|---|---|
| Int | 1234 (number) | 1234 |
| Decimal | 1234.56 (number) | 1234.56 |
| Float | 1.234e10 (number) | 1.234e+10 |
| Text | "text" (string) | quoted only when it contains a comma or a quote |
| Long text | "multi-line\ntext" (escaped newline inside a string) | must be quoted; line breaks inside force multi-line records |
| Date | "2026-09-18" (string) | 2026-09-18 |
| Datetime | "2026-09-18T14:30:00Z" (string) | 2026-09-18 14:30:00 |
| Binary | "base64:..." (string) | not representable - base64 or hex string |
| Boolean | true / false (boolean) | TRUE / FALSE, or 1 / 0 depending on the writer |
| JSON | nested object or array, kept as structure | the whole JSON value quoted, with internal quotes doubled |
Dialect differences
Both JSON and CSV are file formats, so what differs below is how each one chooses to represent a value.
| Property | in JSON | in CSV |
|---|---|---|
| identifiers | Double quotes; backslash escapes | Double quotes; a literal quote is doubled ("" ) |
| dates | No date type: dates arrive as strings and the reader must p... | Conventional text: 2026-09-18 or 2026-09-18 14:30:00 |
| binary | Not supported natively - base64 inside a string | Not supported |
| separator | Braces and commas | Comma "," |
| encoding | UTF-8 by definition | No declaration - UTF-8 works only with a BOM |
| typing | string, number, boolean, null, object, array - no date type | None - every field is text |
| shape | Nested objects and arrays | Flat table, optional header row |
| ceiling | Whole document is usually parsed into memory | No formal limit; row count bounded by memory |
Data File Converter without the manual work
For batch jobs, large files and scheduling use the Data File Converter converter — an offline desktop app for Windows, Linux and macOS. Free trial.
