Convert JSON & MongoDB data to Excel instantly — runs entirely in your browser, no server needed.

Live demo → Live Demo

• Paste & export — paste any JSON array or object and download a .xlsx file in one click
• MongoDB support — paste raw MongoDB shell / Compass output directly (handles NumberInt, ISODate, ObjectId, unquoted keys, single quotes, and more)
• Auto-detection — automatically detects MongoDB format, no need to manually switch
• Live preview — see your data as a table before exporting (up to 100 rows)
• Smart column widths — Excel columns are auto-sized based on your data
• Nested objects — choose to stringify or flatten nested objects with dot notation (e.g. address.city)
• Date handling — keep dates as strings or convert ISO strings to native Excel date cells
• Drag & drop — drop a .json file directly onto the editor
• File upload — click to browse and upload a .json or .txt file
• Keyboard shortcut — Ctrl + Enter to export instantly
• 100% private — all processing happens in your browser, zero data is sent to any server
• No install, no signup, no backend — a single HTML file

Just open the deployed URL and start pasting data. No setup required.

git clone https://github.com/arundidauli/json-to-excel.git
cd json-to-excel

# Simply open in your browser — no build step needed
open index.html

npm i -g vercel
vercel --prod

Or drag the folder into vercel.com/new.

[
  { "name": "Alice", "age": 30, "city": "Delhi" },
  { "name": "Bob",   "age": 25, "city": "Mumbai" }
]

[
  {
    cost: NumberInt('500'),
    createdAt: ISODate('2026-03-24T20:30:07.450Z'),
    subscriberUsername: 'Test',
    subscriberEmail: 'test@gmail.com',
    subscriberName: 'Test',
    athleteName: 'Alex '
  }
]

No build step. No node_modules. No backend. Just one file.

json-to-excel/
└── index.html   # The entire app — HTML, CSS, and JS in one file
└── README.md

Contributions, issues, and feature requests are welcome!

1. Fork the repo
2. Create your branch: git checkout -b feature/my-feature
3. Commit your changes: git commit -m 'Add my feature'
4. Push to the branch: git push origin feature/my-feature
5. Open a Pull Request

MIT © Arun Kumar

Built with ❤️ by Arun Kumar