XLSX → JSON
Extracts the first XLSX worksheet to JSON object arrays with headers as keys and cached formula values, connecting spreadsheets to web apps.
Drag files here or click to upload (multiple files supported)
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How to convert XLSX to JSON
- 1Upload your XLSX file by dragging, clicking, or pasting.
- 2Adjust quality settings if needed.
- 3Click 'Convert Now' and wait for the conversion to complete.
- 4Download your converted JSON file.
About XLSX to JSON conversion
XLSX is a ZIP-compressed XML spreadsheet format compliant with the ISO 29500 standard. It supports multiple worksheets, formulas, and styles, and is the default format for Excel 2007 and later versions. JSON is a text-based data interchange format compliant with the RFC 8259 standard, which only supports six basic data types and is widely used for data exchange between frontend and backend systems. This creates demand for converting XLSX spreadsheets to JSON structures.
This conversion is processed based on the SheetJS engine. It retains cached cell values, automatically infers cell data types, uses the header row as key names for JSON objects, processes only one worksheet per conversion, and outputs pure text JSON. The output file is usually smaller than the original XLSX file, and there are no additional quality parameters to adjust.
This conversion is suitable for scenarios including importing Excel spreadsheet data into frontend projects, preparing data sources for backend API interfaces, and initializing offline data for mobile applications. It requires the original file to be a standard XLSX file generated by Excel 2007 or later versions, and is compatible with various desktop and mobile workflows.
XLSX vs JSON: technical comparison
| Feature | XLSX | JSON |
|---|---|---|
| Released | 2007 | 2001 |
| Developer | Microsoft / ECMA-376 | Douglas Crockford |
FAQ about XLSX → JSON
Will data quality change after conversion?
The conversion fully retains the original cell text and numeric data, and does not introduce additional errors. It reads based on the SheetJS engine, and only outputs formulas as their calculated cached values.
Will all multiple worksheets be retained?
Only one worksheet's data is retained per conversion. You can select the target worksheet to export during conversion, and data from unselected worksheets will not appear in the final output JSON.
What is the single file size limit?
The maximum single file size supported by this site is 50MB, and only one file can be converted at a time. Files exceeding this size will be rejected by the system.
Will my files be saved?
Files are uploaded to the server via HTTPS for conversion. After conversion is complete, the server immediately deletes both the source file and the output file, and does not store any files.