C# minimal API • Downloadable Excel output
JSON to Excel (.xlsx) Creator
Paste a JSON payload or drop a file and get a ready-to-download Excel workbook. Arrays become their own sheets,
nested objects use dot-notation columns, and every run ships as a clean .xlsx file.
Input
Choose exactly one input type per run. Switch modes to paste text or drop/upload a JSON file.
When using text mode, drag a snippet into the textarea or paste directly.
Drop a JSON file here or click to browse.
Use this area only when "Upload or drop a file" mode is selected.
How it shapes your Excel
- Top-level arrays become the main Data sheet.
- Nested arrays spin up their own sheets with index columns.
- Objects are flattened with dot notation for nested keys.
- Nulls are blank, and primitive arrays become tidy value rows.
Perfect for "put this JSON into Excel" requests—no manual headers to map. The download is ready immediately after the server processes your payload.