Convert an Excel sheet into structured JSON data, instantly. 100% free, no sign-up — nothing ever leaves this browser tab.
Excel to JSON reads the first sheet of your workbook and converts each row into a JSON object, using your header row as the field names. The result is ready to drop straight into an app, API, or script.
Developers and no-code builders often need spreadsheet data in JSON format to feed into an application or automation. This tool skips the manual conversion step, turning a familiar spreadsheet layout into clean, structured JSON entirely in your browser.
No installs, no accounts — just your browser doing the work.
Scroll up (or tap the button above) to load the tool instantly — no account or install needed.
Add your file, text, or numbers into the tool above.
Sensible defaults are already selected — tweak anything you need.
Your result is generated locally and ready in seconds — no waiting room.
Column headers automatically become JSON field names.
Your spreadsheet is read directly in this browser tab and never uploaded.
No server queue — conversion happens the moment you drop the file.
Because Excel to JSON runs locally, teams handling sensitive data — finance, HR, legal, operations — can use it without the compliance questions that come with uploading documents to a third-party server.
Yes, numeric and boolean-looking cells are converted to their proper JSON types where possible.
The first row is always treated as the header — add one if your data doesn't have it.
No. Excel to JSON runs entirely in your browser using the SheetJS library.