📄 Document Converter

Convert Excel Rows to JSON Objects for Web Apps and APIs

Excel spreadsheets with tabular data need to become JSON for web applications, REST APIs, and database imports. XLSX-to-JSON reads each Excel row as a JSON object using the header row as property keys, producing a JSON array where every row is an object — the exact format expected by JSON.parse() in JavaScript, json.loads() in Python, and REST API POST bodies.

⚡ Convert XLSX to JSON Now Browse All Tools

✓ Free forever✓ No upload✓ No signup✓ Instant

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Ready to convert your Excel spreadsheet to JSON?

100% in your browser · Typed numbers and booleans · Multi-sheet support

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How to Convert XLSX to JSON

Open the Converter

Click "Convert Now" — opens on the Document tab with XLSX selected.

Upload Your XLSX

Drag & drop your Excel file or click Browse. Up to 50 MB.

Convert Instantly

Conversion runs entirely in your browser — no server upload.

Download JSON

Your structured JSON file downloads automatically, ready to use.

Excel Spreadsheets as JSON: Connecting Tabular Data to Modern Apps

The gap between spreadsheet data and web application data is almost always bridged by JSON. A product catalog in Excel needs to become JSON for a Next.js storefront's getStaticProps. Configuration data managed in Google Sheets needs to become JSON for a Node.js app's config loader. Survey responses exported from SurveyMonkey as XLSX need to become JSON for a Python analytics pipeline. Test fixtures maintained in Excel need to become JSON arrays for a Jest or pytest test suite. XLSX-to-JSON converts each worksheet's header row into JSON property names and each data row into a JSON object in the output array. Numbers are typed as JSON numbers (not strings). Boolean-like values (TRUE/FALSE, Yes/No) are typed as JSON booleans where possible. Empty cells produce null. Multiple worksheets produce either a multi-key JSON object (with worksheet names as top-level keys) or separate JSON files, making the full workbook accessible to any consuming application.

Why Convert XLSX to JSON?

✓ Feed Excel product catalog data to a Next.js or React app via getStaticProps JSON import
✓ Convert Excel CRM or customer data exports to JSON for REST API bulk-import endpoints
✓ Transform Excel test fixtures to JSON arrays for Jest, Mocha, or pytest test data files
✓ Export Excel configuration tables to JSON for Node.js or Python application config loading
✓ Convert Excel survey or form response exports to JSON for D3.js or Chart.js visualization

Features

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100% Private

Files never leave your browser. Zero server uploads.

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Instant

Conversion completes in seconds.

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Free

No account, no fee, no watermarks. Ever.

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Batch Convert

Convert multiple XLSX files to JSON in one go.

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Typed Output

Numbers, booleans, and nulls correctly typed in JSON.

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Mobile-Friendly

Works on any device — phone, tablet, desktop.

Frequently Asked Questions

The output is a JSON array: [{"Product":"Widget","Price":9.99,"InStock":true}, ...]. The first row of the worksheet becomes the keys, and each subsequent row becomes one object in the array.

The converter types numeric cells as JSON numbers (integers or floats), not strings. "Price":"9.99" becomes "Price":9.99 in the output, which is what JavaScript and Python numeric operations expect.

Each worksheet produces a separate key in the top-level JSON object, with the sheet name as the key. For example: {"Sheet1": [...], "Sheet2": [...]}. You can then destructure the sheet you need.

If the first row contains data rather than headers, the converter uses generic column names like col_1, col_2, col_3 as JSON property names. You can rename these in the JSON after conversion.

Yes. Use MongoDB's mongoimport with the --jsonArray flag: mongoimport --jsonArray --file output.json --collection products. The array format is directly compatible.

Excel dates are stored internally as serial numbers. The converter outputs dates as ISO 8601 strings ("2024-01-15") or timestamps in the JSON, which are parseable by new Date() in JavaScript and datetime.fromisoformat() in Python.

No. All conversion happens in your browser. Your spreadsheet — which may contain business data, customer records, or proprietary metrics — never leaves your device.