Convert Excel to JSON Online

Convert Excel to JSON Online

Use this free Excel to JSON converter to turn spreadsheet data into clean, structured JSON without writing code. Upload an XLSX, XLS, or CSV file, select the worksheet you need, choose how rows should be converted, and download or copy the result in seconds.

The converter processes files locally in your browser. Your spreadsheet is not uploaded or stored by this tool, making it useful for product lists, test data, internal records, survey exports, and application imports.

How to convert Excel to JSON

1. Upload an Excel or CSV file using the upload area.
2. Select the worksheet you want to convert.
3. Choose whether the first row contains your property names.
4. Select formatted JSON for readability or compact JSON for smaller output.
5. Review the generated JSON, then copy it or download it as a .json file.

Convert spreadsheet rows into JSON objects

Most spreadsheets use the first row for column headings. When Use first row as headers is selected, each later row becomes a JSON object.

For example, this spreadsheet:

Can become:

[object HTMLPreElement]

You can also convert rows into arrays if your software expects positional values instead of named properties.

Supported file formats

This tool supports common spreadsheet formats:

• XLSX files from Microsoft Excel and compatible spreadsheet apps
• XLS files from older Excel versions
• CSV files exported from Excel, Google Sheets, and other tools

If your workbook contains multiple worksheets, select the exact sheet you want before converting.

Formatted vs compact JSON

Choose Formatted JSON when you need readable output for development, review, or debugging. It includes line breaks and indentation.

Choose Compact JSON when you need a smaller payload for an API request, configuration file, or data import.

Both options contain the same data; only the presentation changes.

Tips for cleaner JSON output

Use a clear header row with unique column names, such as product_name, price, or sku. Remove unused columns and blank rows before conversion when possible. Review dates, IDs, postal codes, prices, and leading-zero values carefully, because spreadsheet applications may format these values differently from the way your receiving system expects them.

For best results, check the JSON preview before importing it into an application or sending it to an API.

Privacy and data handling

Your file is processed locally in your browser and is not sent to this tool’s server. The spreadsheet remains available only during your current browser session. Clear the tool or close the page to remove the file from the session.

Always confirm that you are authorized to process and share the spreadsheet data you upload.

Excel to JSON FAQs

Can I convert multiple Excel sheets to JSON?

Yes. Upload the workbook and select one worksheet at a time. Convert each sheet separately to create focused JSON output.

Does the tool use the first row as JSON keys?

Yes, when the header option is enabled. The first row becomes the property names for each JSON object.

Can I remove empty rows?

Yes. Enable the empty-row option to skip rows that do not contain data.

Is Excel to JSON conversion free?

Yes. You can upload, convert, copy, and download JSON without creating an account.

Does this tool preserve every Excel formula and style?

No. JSON stores data, not spreadsheet formatting. Review calculated values and data types in the preview before using the exported JSON in production.