Are my XLSX files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting XLSX to JSON free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting XLSX to JSON lose quality?

No. JSON stores the same content without discarding anything, so the result is identical in quality to the original.

Do I need to install anything to open JSON files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the JSON afterwards needs whatever software normally handles JavaScript Object Notation on your device.

XLSXtoJSON

Convert XLSX to JSON

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert XLSX to JSON free and without an account: drop the file above and the JSON is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What XLSX and JSON are for

The Excel format since 2007. Several sheets, formulas, formatting.

The data format of the web. Nested structures, read by every programming language.

How to convert XLSX to JSON

Drop your XLSX file onto this page, or click to pick one.
Choose JSON as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished JSON file.

XLSX vs JSON: what changes

XLSX compared with JSON
	XLSX	JSON
Full name	Excel Workbook	JavaScript Object Notation
File extension	.xlsx	.json
Media type	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	application/json

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.

XLSX to JSON: common questions

Are my XLSX files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting XLSX to JSON free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting XLSX to JSON lose quality?: No. JSON stores the same content without discarding anything, so the result is identical in quality to the original.
Do I need to install anything to open JSON files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the JSON afterwards needs whatever software normally handles JavaScript Object Notation on your device.