Excel to JSON
Drop an .xlsx file — pick a sheet and get clean JSON. Dates become ISO strings, nested objects from dot-named columns.
Excel file
JSON
Frequently asked questions
Which files are supported?+
Modern Excel workbooks (.xlsx). For .xls or Numbers files, save as .xlsx or CSV first.
How are dates converted?+
Excel dates become ISO strings like 2026-10-15, or a full timestamp when the cell has a time.
Can I convert a specific sheet?+
Yes — all sheets are listed after you open the file.
Can it create nested JSON?+
Yes. Columns named like customer.email become nested objects. Switch it off for flat objects.
Is my file uploaded?+
No. The workbook is read in your browser and never leaves your computer.