Want to convert Excel file to JSON file?
Try Withdata Data File Converter, a desktop Excel to JSON converter for Windows, MacOS, and Linux, Convert Excel 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 Excel file(s) to online services.
- Support Windows, Linux, and macOS.
Download Withdata DataFileConverter 
Convert Excel to JSON
Choose Excel file -> Set JSON file -> Convert Excel to JSON
“Start a New Convert” for “Excel to JSON”.
Select From “File” “Excel” To “File” “JSON”.
1. Open source Excel file.
Support large Excel file ( > 4GB ).
Source Excel file’s content is like this:
2. Config target JSON file.
3. Set rows options.
4. Convert Excel to JSON.
After converting, you can view the output JSON file.
More about Excel to JSON converter
Download Withdata DataFileConverter
See Video: Convert Excel file to JSON file without coding
See also:
- Merge multiple Excel files into one JSON
- Batch convert Excel files to JSON files
- Convert Excel to JSON Online for Free
EXCEL → JSON reference
Type mapping
| Value kind | in EXCEL | in JSON |
|---|---|---|
| Int | 1234 (a real numeric cell) | 1234 (number) |
| Bigint | 9007199254740993 (exact only while the cell stays text) | 9007199254740993 |
| Decimal | 1234.56 (numeric cell, format controls the displayed decimals) | 1234.56 (number) |
| Float | 1.234E+10 (numeric cell) | 1.234e10 (number) |
| Text | text cell; leading zeros survive only if the column is text | "text" (string) |
| Long text | text cell; wraps inside the cell rather than the row | "multi-line\ntext" (escaped newline inside a string) |
| Date | a serial number plus a date cell format | "2026-09-18" (string) |
| Datetime | a serial number plus a date-time cell format | "2026-09-18T14:30:00Z" (string) |
| Binary | not representable as data | "base64:..." (string) |
| Boolean | TRUE / FALSE (a real boolean cell) | true / false (boolean) |
| JSON | a text cell; the quotes are part of the value | nested object or array, kept as structure |
Dialect differences
Both EXCEL and JSON are file formats, so what differs below is how each one chooses to represent a value.
| Property | in EXCEL | in JSON |
|---|---|---|
| identifiers | Not applicable; a cell holds exactly one value | Double quotes; backslash escapes |
| dates | Stored as a serial number; only the cell format makes it lo... | No date type: dates arrive as strings and the reader must p... |
| binary | Only as text or an embedded object, not as a data column | Not supported natively - base64 inside a string |
| separator | Cells, not delimiters | Braces and commas |
| encoding | UTF-8 internally, declared in the package | UTF-8 by definition |
| typing | Real cell types: text, number, date, boolean, error | string, number, boolean, null, object, array - no date type |
| shape | Multiple sheets, each a flat grid | Nested objects and arrays |
| ceiling | 1,048,576 rows x 16,384 columns per sheet; 255 sheets per w... | Whole document is usually parsed into memory |
Do it online, free
Skip the manual work — convert Excel to JSON online, free (runs in your browser, nothing is uploaded). For large files or batch jobs, use the desktop apps.
