XLS to JSON
Convert Excel spreadsheets (.xls, .xlsx) to JSON online quickly and for free.
How it works
The tool uses the SheetJS library to read Excel spreadsheet content directly in the browser. The first row is used as JSON keys and data is converted into an array of objects.
Facts about XLS to JSON Conversion
- JSON (JavaScript Object Notation) is a lightweight format widely used in web APIs.
- The conversion is performed entirely in the browser, with no data sent to external servers.
- Duplicate headers are automatically renamed (e.g. name, name_2, name_3).
- The preview shows up to 500 rows; the download includes all spreadsheet data.
Official references
Consult the specifications of the formats used:
- ECMA-376 β Office Open XML File Formats: The official .xlsx format standard.
- RFC 8259 β The JavaScript Object Notation (JSON): The official JSON format specification.