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Convert Excel to JSON

Ethical Tube's free Excel to JSON converter converts Excel spreadsheets into JSON, the standard data format of web APIs, with a preview you can copy. It runs entirely in your browser, so your spreadsheets are never uploaded, and it's free with no sign-up or watermark.

Files are converted on your device and never uploaded.

Price
Free
Uploads
None, it runs on your device
Sign-up
Not needed
Batch
Unlimited files
Output
JSON with a preview
Install
Nothing to install

How it works

How to convert Excel to JSON

  1. Add your Excel files

    Drop Excel files onto the converter, click to choose them, or paste from the clipboard. Add as many as you like.

  2. Check the settings

    JSON is already selected. The result appears in a preview you can copy, or download it as a file.

  3. Download your JSON files

    Copy the result from the preview, or download it. With several files, Download all saves them in one ZIP file.

The formats

Excel and JSON at a glance

  • What is an Excel file?

    XLSX is the workbook format Microsoft Excel has used since 2007. A workbook can hold several sheets with formulas, formatting, charts, and filters, and it's the standard way spreadsheets are shared at work. It opens in Microsoft Excel, Google Sheets, Apple Numbers, LibreOffice Calc, and WPS Office.

  • What is a JSON file?

    JSON is a text format for structured data made of objects, arrays, strings, numbers, and true or false values. It's the standard format for web APIs and config files, and every programming language can read it. Nested data doesn't map directly onto a flat table. It opens in any text editor, VS Code, browsers, and every programming language.

Good to know

What changes when you convert Excel to JSON

  • Pick which sheet to convert. Formulas are saved as their last calculated values, and dates become ISO dates like 2026-10-17.
  • Each row becomes a JSON object. Numbers and true or false values become real JSON numbers and booleans.
  • Very large files, in the hundreds of megabytes, may be slow, and the preview shows only the beginning.

FAQ

Questions, answered

Is this Excel to JSON converter free?

Yes. It's completely free, with no sign-up, no watermark, and no limit on how many files you convert. It costs Ethical Tube nothing to run, because the conversion happens on your own device rather than on a server.

Are my files uploaded anywhere?

No. The conversion runs inside your browser with open-source CSV, JSON, YAML, XML, and Excel libraries, so your files never leave your device. Once the page has loaded, it even works offline.

Can I paste Excel instead of uploading a file?

Yes. Paste Excel text onto the page and it's converted the same way. Nothing you paste leaves your browser.

Can I convert several Excel files at once?

Yes. Add as many as you like. They're converted one after another, and you can download each JSON file as soon as it's ready or all of them in one ZIP file.

Does it work on iPhone, Android, Mac, and Windows?

Yes. It works in Chrome, Edge, Firefox, and Safari, on computers and phones.

What can open a JSON file?

Any text editor, VS Code, browsers, and every programming language.

Is there a file size limit?

There's no upload limit because nothing is uploaded. The practical limit is your device's memory: everyday files are fine, and most computers handle documents with hundreds of pages.

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