The FinancialDataTools.com Excel to JSON Converter is a free, browser-based tool for converting Excel (XLSX) files to JSON format. It runs entirely in your browser — no file is ever uploaded to any server.
How It Works
Drop your Excel file onto the left panel or click Open. Your source data is previewed in a table. Click Convert to JSON to generate the output. Click Export JSON to download the result file.
Privacy and Security
All file processing happens inside your browser using JavaScript. No file content is transmitted to any server. Your data stays private on your device.