CSV/Excel to JSON
CSV/Excel to JSON is a free online converter that turns CSV or Excel (.xlsx/.xls) files into JSON data. It handles multi-sheet workbooks with a sheet selector, lets you use the first row as JSON keys, and offers one-click copy and download of the result.
Files are parsed and converted locally in your browser — nothing is uploaded, so business spreadsheets stay private. Free with no registration, it's useful for developers and analysts importing tabular data into frontend projects, API tests, or database seed scripts.
How to Use
- Click to upload or drop a .csv/.xlsx/.xls file
- For multi-sheet Excel files, pick the worksheet from the dropdown
- Toggle the "first row as keys" option as needed
- Copy the generated JSON or download it as a file
FAQ
Is the CSV/Excel to JSON converter free?
Yes, it's completely free with no conversion limits and no account needed.
Is my file data uploaded anywhere?
No. Files are parsed and converted entirely in your browser, so even sensitive spreadsheets never leave your device.
What does "first row as keys" do?
When enabled, the first row becomes the field names of each JSON object, producing one object per data row. When disabled, each row is output as an array of values. Choose based on whether your table has a header.
Which file formats are supported?
It accepts .csv, .xlsx, and .xls files. If an Excel workbook contains multiple sheets, you can switch between them in the dropdown and convert any one of them.