XLSX to JSON Converter
Convert an Excel XLSX worksheet into structured JSON records with readable column names and values for APIs, development, and data imports.
Drop your XLSX files here
Up to 50MB per file.
Files never leave your browser
How to Convert
- 101
Upload your XLSX files
Drag and drop or select XLSX files from your device. You can upload multiple files at once.
- 202
Configure Output
Start the conversion. Crest Convert will prepare the JSON file using the appropriate format engine.
- 303
Download JSON files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert XLSX to JSON?
XLSX is the current Microsoft Excel workbook format with worksheets, formulas, and formatted cells. Converting it to JSON creates a structured text format widely used by APIs, applications, and development tools, ready for workflows that use the destination format.
JSON opens in text editors, code editors, browsers, API clients, and development tools.
Frequently Asked Questions
How do I convert XLSX to JSON?
Add your XLSX file, start the conversion, and download structured JSON records using your worksheet headers as field names. Everything is processed directly in your browser.
Which XLSX data is converted?
The converter reads the first Excel worksheet, preserving their readable values, record order, and meaningful field names.
Are spreadsheet headers used as JSON keys?
Yes. The first worksheet row provides the JSON field names, and every following row becomes an individual structured record.
Where can I use the converted JSON file?
JSON opens in text editors, code editors, browsers, API clients, and development tools.
Can I convert several XLSX files?
Yes. Add multiple XLSX files and download a separate JSON result for each source file.
Is XLSX to JSON free and private?
Yes. Conversion happens directly in your browser, so your data stays on your own device. No account is required.