Excel to JSON Converter | Free XLSX to JSON Online Tool

Excel to JSON converter turns any .xlsx or .csv worksheet into clean JSON records, with header keys, ISO dates and multi sheet support. Free, private, runs in your browser. Designed specifically for developers and professionals, this free online converter runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

Also known as: excel to json converter · convert excel to json online · xlsx to json free · spreadsheet to json converter · excel file to json array · worksheet to json online · json converter

json tools

csv and spreadsheet tools

file converters

converters

Excel Workbook Input

Drop an .xlsx or .csv file here or click to browse

Multi sheet workbooks, formulas results and dates supported

First row is the header

Dates as ISO strings

Skip empty rows

Pretty print

JSON Output

About Excel to JSON Converter

Turn an .xlsx worksheet or .csv export into clean JSON you can drop straight into an API request, a seed script or a test fixture, with the header row mapped to object keys and Excel date serials converted to ISO strings.

Key Features

Reads every worksheet in a workbook and lets you pick which one to convert
Maps the header row to JSON keys, or exports raw rows as an array of arrays
Converts Excel date serial numbers to ISO 8601 dates instead of raw numbers such as 46095
Streams large sheets, so a 100,000 row workbook converts in about a second

Use Cases

Load a spreadsheet of test data into a REST API or database seed script
Hand a product team's .xlsx export to a frontend as a ready to use JSON fixture
Inspect a client workbook as structured data before writing an import job

Related Keywords

excel to json

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excel file to json array

csv to json converter

worksheet to json online

Your workbook stays on your computer

The .xlsx file is unpacked and parsed by JavaScript in your browser. Nothing is uploaded, so financial models, payroll data and customer lists never touch a server.

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Frequently asked questions

What is Excel to JSON Converter used for?

Excel to JSON converter turns any .xlsx or .csv worksheet into clean JSON records, with header keys, ISO dates and multi sheet support. Free, private, runs in your browser.

Is Excel to JSON Converter free to use?

Yes. Excel to JSON Converter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use Excel to JSON Converter?

No. Excel to JSON Converter works immediately in your browser with no signup, login, or email address required.

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