Think CONVERT Files stay on this device
Never uploadedSpreadsheets, contacts, documents and routes are converted inside your browser. We never see them.
Free, with no limitsNo account, no daily limit, no file-size cap. As many files as you like.
Works on phones, and offlineiPhone, Android and computers, even without a connection once loaded.

How to use Excel to JSON

  1. Open your Excel workbooks.

  2. Choose all sheets or the first, and the JSON shape.

  3. Press Convert and save the JSON files.

Questions

How are dates written?

As text in the form 2026-11-11, or 2026-11-11 14:30 when there is a time, which every program can read.

Are my files uploaded?

No. Everything happens inside your browser, on your own device. The site's security settings stop the page from sending your files anywhere.

Is it free?

Yes. No sign-up, no daily limit and no watermark.

Does it work on iPhone and Android?

Yes, in Safari, Chrome and other modern browsers. You can open files from the Files app or your downloads, and save the results back.

Know someone who'd find this handy?

Send the link to a friend or colleague. It's free for them too, with no sign-up.

Other converters upload your files. This one can't.

Customer lists, contacts, bank exports and the routes you run from home stay on your phone or computer from start to finish.

How it stays private
  1. 1You open a file. It loads into your browser only.
  2. 2The conversion happens on your device.
  3. 3You save the result. Nothing was sent anywhere.

All tools

64 converters for the files people use every day.

Spreadsheets and CSV

11 tools

JSON, XML and YAML

12 tools

Subtitles

8 tools

Documents

12 tools

Contacts and calendars

7 tools

GPS and maps

9 tools

Archives

5 tools

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