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Jump straight into adjacent tools while the same JSON context and workflow are still fresh.

CSV to JSON

Convert CSV text or files to JSON

JSON to Table

View the output as a table

JSON to CSV

Export JSON back to spreadsheet

JSON Validator

Validate the resulting JSON

JSON to TypeScript

Generate types from the data

JSON to Schema

Create a schema from the output

Excel to JSON Converter – Convert XLSX to JSON Online

Convert Excel spreadsheets to JSON directly in your browser. Upload an .xlsx file, select a sheet, and export structured JSON — no server upload, no registration, completely private.

Sheet Selector: Switch between multiple sheets in the workbook.
Header Row: Use the first row as JSON object keys.
Values Only: Stored cell values exported — no formula recalculation.
Privacy-First: File never leaves your browser.

How to Convert Excel to JSON

Click Upload Excel or drag and drop an .xlsx file. After upload, select the target sheet from the dropdown. Enable Header row to use the first row as JSON keys. Click Download JSON to save the output.

Reference guide

Excel to JSON Reference

When to Use Excel to JSON

API Import: Feed spreadsheet data into REST or GraphQL APIs.
Database Seeding: Prepare bulk insert data from Excel exports.
Config Generation: Convert settings spreadsheets to JSON configs.
Data Migration: Move legacy Excel data to modern storage formats.

Header vs Raw Output

Header row enabled

Row 1 → keys, rows 2+ → objects. Best for named column data.

Header row disabled

Each row → raw array. Useful when row 1 is also data.

Excel to JSON in Python and Node.js

Programmatically, Python's openpyxl or pandas.read_excel() handle XLSX parsing efficiently. In Node.js, the xlsx (SheetJS) library offers the same cross-platform capability. For smaller spreadsheets shared by non-technical stakeholders, this online converter eliminates the need to spin up a script. After converting, validate your output with our JSON validator or view it as a JSON table before importing.

Frequently Asked Questions

Is my data safe with this JSON tool?

Yes. This tool uses 100% client-side processing. Your JSON data never leaves your browser and is never sent to our servers, ensuring maximum privacy and security.

Does this tool work offline?

Once the page has loaded, all processing happens locally in your browser. You can disconnect from the internet and the tool will continue to work — no server connection is required to format, validate, or convert your JSON.

Is there a file size limit?

No server-side limits apply because everything runs in your browser. Practical limits depend on your device's memory, but modern browsers handle JSON files of tens of megabytes without issue.

What file formats are supported?

This tool supports .xlsx (Excel 2007+) files. Legacy .xls files may work depending on browser support. All parsing happens in your browser — the file is never uploaded to a server.

How do I select a specific sheet?

After uploading the file, the sheet selector will list all sheets in the workbook. Click the sheet name to switch to it. The first sheet is selected by default.

What does 'Header row' do?

When enabled, the first row of the selected sheet is used as property keys in the output JSON objects. Each subsequent row becomes one object in the array. When disabled, each row is output as an array of cell values.

Are formulas and formatting preserved?

No — only stored cell values are exported, not formulas or cell formatting. This keeps the output clean and prevents formula recalculation errors in the browser.