Want to convert API response JSON to Excel file?
Try Withdata Data File Converter, a JSON to Excel converter for Windows, Mac, and Linux, Convert JSON from RESTful API 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.
Download Withdata DataFileConverter 
Convert API response JSON to EXCEL
Click “Start a New Convert” at task dialog.
then show the wizard.
Select source/target file type.
1. Input the RESTful API URL, and download to JSON file.
2. Open the saved JSON file.
3. Config target EXCEL file.
4. Set rows options.
5. Convert API response JSON to EXCEL.
See EXCEL file
Convert API response JSON to EXCEL in command line
Save “JSON to Excel” session, then you can:
- Convert API response JSON to EXCEL in Windows command line.
- Convert API response JSON to EXCEL in Linux command line.
- Convert API response JSON to EXCEL in macOS command line.
Set scheduled tasks for converting API response JSON to EXCEL
You can schedule and automate this converting task by:
- Save session and create .bat (Windows) or .sh (Linux/macOS) file for “API response JSON to Excel” conversion.
- Set scheduled task for “API response JSON to Excel” conversion.
FAQ
More about Withdata DataFileConverter – API JSON to Excel converter
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JSON → EXCEL reference
Type mapping
| Value kind | in JSON | in EXCEL |
|---|---|---|
| Int | 1234 (number) | 1234 (a real numeric cell) |
| Bigint | 9007199254740993 | 9007199254740993 (exact only while the cell stays text) |
| Decimal | 1234.56 (number) | 1234.56 (numeric cell, format controls the displayed decimals) |
| Float | 1.234e10 (number) | 1.234E+10 (numeric cell) |
| Text | "text" (string) | text cell; leading zeros survive only if the column is text |
| Long text | "multi-line\ntext" (escaped newline inside a string) | text cell; wraps inside the cell rather than the row |
| Date | "2026-09-18" (string) | a serial number plus a date cell format |
| Datetime | "2026-09-18T14:30:00Z" (string) | a serial number plus a date-time cell format |
| Binary | "base64:..." (string) | not representable as data |
| Boolean | true / false (boolean) | TRUE / FALSE (a real boolean cell) |
| JSON | nested object or array, kept as structure | a text cell; the quotes are part of the value |
Dialect differences
Both JSON and EXCEL are file formats, so what differs below is how each one chooses to represent a value.
| Property | in JSON | in EXCEL |
|---|---|---|
| identifiers | Double quotes; backslash escapes | Not applicable; a cell holds exactly one value |
| dates | No date type: dates arrive as strings and the reader must p... | Stored as a serial number; only the cell format makes it lo... |
| binary | Not supported natively - base64 inside a string | Only as text or an embedded object, not as a data column |
| separator | Braces and commas | Cells, not delimiters |
| encoding | UTF-8 by definition | UTF-8 internally, declared in the package |
| typing | string, number, boolean, null, object, array - no date type | Real cell types: text, number, date, boolean, error |
| shape | Nested objects and arrays | Multiple sheets, each a flat grid |
| ceiling | Whole document is usually parsed into memory | 1,048,576 rows x 16,384 columns per sheet; 255 sheets per w... |
Data File Converter without the manual work
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