Excel to JSON converter
Convert Excel to JSON as you type. Nothing is uploaded, and the result can be previewed as a table, copied or downloaded.
Loading the converter… It runs locally in your browser.
How to convert Excel to JSON
- Open an .xlsx, .xls or .ods file, or copy cells in Excel or Google Sheets and paste them into the input panel.
- Choose whether numbers and booleans should be detected, and whether dotted headers like user.name should become nested objects.
- Check the result: switch the output to “Table” view to see it as a grid.
- Press “Copy” or “Download .json”. The conversion runs on your device, so large files never leave it.
About Excel
Microsoft Excel workbooks (.xlsx, and legacy .xls). TableForge also reads OpenDocument .ods and data copied straight out of a spreadsheet.
About JSON
JavaScript Object Notation (RFC 8259): nested objects and arrays with strings, numbers, booleans and null. The default payload format of web APIs.
Questions people ask
Is my Excel data uploaded anywhere?
No. The Excel to JSON conversion runs entirely in your browser with JavaScript. The page works offline once it has loaded, and TableForge never receives your data.
How large a file can I convert?
The limit is your device's memory. Files of tens of megabytes (hundreds of thousands of rows) convert fine on a typical laptop. The preview shows the first 200 rows, but the download always contains every row.
Will numbers stay numbers in the JSON?
With “Detect numbers & booleans” on, values like 42, 3.14 and true become real numbers and booleans. Values with leading zeros such as ZIP codes (00742) are kept as text so they are not corrupted. Turn the option off to keep every value as a string.
Can I convert JSON back to Excel?
Yes, use the JSON to Excel converter at tableforge.io/json-to-excel, or the universal converter on the home page.
Are formulas exported?
Each cell is exported as the value Excel last calculated and saved, with its display formatting (dates, currency). The formulas themselves are not exported, because CSV, JSON and similar formats have no concept of them.