How are the keys named?

From the header row of each sheet. Rows under it become records; several sheets become lists by sheet name.

Can I edit the result before downloading?

Yes. The file opens in Mega Excel Studio, a full spreadsheet with an AI assistant — change anything, then download.

Is it safe to convert Excel to JSON here?

Yes. Your file travels over an encrypted connection and stays private to you — nobody else can open it. Projects you save are kept in your account until you delete them, and download links we email you expire after 7 days.

Excel Tools

Excel to JSON

Turn a spreadsheet into JSON records named by the header row. It opens in Mega Excel Studio, so you can check and change anything before you download.

Drop a spreadsheet

or browse from your device — .xlsx, .xls, .ods, .csv

Private & secure· Check before you download· No watermark

Convert Excel to JSON online, the right way

Developers need spreadsheet data as JSON for apps, APIs and tests. Drop your file, choose the options that matter, and it opens in Mega Excel Studio with the export window ready. Each row becomes a record named by the header row, with numbers as numbers and dates as text. Nothing is final until you say so: fix a value, rename a heading or restyle it, then download your JSON file — or another format from the same window.

Named by the header

Clean records, ready for code.

Checked in Mega Excel Studio

See the result and change anything before you download.

Other formats too

The same export window offers every other format.

Frequently asked questions

You can open your file, convert it and check or change everything in the studio before you pay anything. Downloading the finished file is part of every MojoPDF plan — start with the 7-day trial for $1 and cancel any time.