Excel JSON

Excel to JSON Converter

Convert Excel to JSON in your browser. Free, private, and fast. Excel data as JSON — nothing is uploaded.

Drag & drop your Excel file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert Excel to JSON?

Turn a spreadsheet into JSON for an API, a script or a web app. The first row becomes the keys; a workbook with several sheets produces an object with one array per sheet.

Common use cases

  • You have a Excel file and need it in JSON format.
  • The target software or platform requires JSON but your file is in Excel.
  • Typical use of JSON: REST API payloads and configuration files.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: JSON has no comments, no date type, and gets hard to read when deeply nested or minified — formatting and conversion tools help.

How to Convert Excel to JSON

  1. Upload or drop your Excel file into the converter above.
  2. Adjust any output settings for JSON if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

Excel (Microsoft Excel Workbook)

Microsoft Excel's .xlsx format is the world's most widely used spreadsheet format. Excel files support multiple sheets, formulas, charts, pivot tables, conditional formatting, macros, and rich cell styling — making them the standard for financial modelling, data analysis, and business reporting.

Compatibility: Supported by Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers, and most spreadsheet applications.

JSON (JavaScript Object Notation)

JSON is the standard data-interchange format of the web. It represents structured data as nested objects and arrays in plain text — human-readable, language-independent, and natively supported by every programming language and API in common use.

Compatibility: Universal — every programming language, browser, and modern tool reads JSON.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

JSON to Excel Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.