Click to select or drag & drop Excel file here
Supports .xlsx Β· .xls Β· .csv Β· Max 100MB
This Excel to JSON converter is a pure frontend tool that helps you quickly transform spreadsheet data into JSON format for data exchange and programmatic processing.
Use Cases:
Powered by SheetJS library. Supports multi-worksheet selection and custom output formats. All processing happens locally in your browser β your data never leaves your computer.
Converting with the Excel to JSON Converter takes just three steps:
Each Excel row becomes a JSON object with headers as keys and cell values as values. Supports two output formats: Array format (standard JSON array) and Object format (dictionary with a specified column as keys).
Excel date serial numbers are automatically converted to ISO date strings (e.g., "2025-01-15T08:00:00.000Z") for cross-platform compatibility. Text-formatted dates are preserved as-is.
Empty cells are output as null in the JSON. Entirely empty rows are skipped. You can filter out null values from the output if needed.
Yes. If your Excel file contains multiple worksheets, you can select which one to convert. Currently processes one sheet at a time β you can switch sheets and convert separately.
Both formats are processed using the same SheetJS engine. CSV files work identically but don't carry formatting information (fonts, colors, merged cells, etc.) β only plain text data is preserved.