What does this tool do?
Paste a JSON array of objects below to generate and download an Excel (.xlsx) file. Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Paste your your json into the left-hand box.
- Click Convert & Download.
- Your file downloads automatically once the conversion completes.
Frequently asked questions
What JSON structure works best?
An array of flat objects — each object becomes one spreadsheet row and the union of all keys becomes the column headers.
Does the file download automatically?
Yes — clicking the convert button builds the spreadsheet and immediately triggers a download of export.xlsx to your device.
Is this processed on a server?
No — the .xlsx file is generated entirely client-side in your browser and is never uploaded anywhere.