JSON to Excel Converter – Free Online Tool
Convert JSON arrays to Excel (.xlsx) format instantly in your browser. Paste your JSON and download a spreadsheet — no server, no signup.
JSON Input
Preview (Tab-Separated)
What Is a JSON to Excel Converter?
A JSON to Excel converter turns a JSON array of objects into a spreadsheet you can open directly in Microsoft Excel, Google Sheets, or any other spreadsheet app. Each JSON key becomes a column header, and each object in the array becomes a row.
This tool runs entirely in your browser — your data never leaves your machine. It generates a tab-separated file with an .xls extension that Excel opens natively, no plugins or server required. The Blob API handles the file creation client-side.
How to Use This Tool
Paste or upload your JSON
Drop a JSON array of objects into the left panel, or click Upload to load a .json file from disk. The array can contain any flat or mixed-type objects.
Check the preview
The right panel instantly shows a tab-separated preview of your data — one row per JSON object, columns aligned to the keys. If anything looks off, fix the JSON on the left and the preview updates in real time.
Download or copy
Hit Download .xls to get a file Excel opens directly. Or click Copy to grab the tab-separated text and paste it straight into the JSON Formatter or any spreadsheet tool. Works great with Google Sheets — just paste into a cell.
Where This Actually Helps
Data exports from REST APIs almost always come back as JSON. When a product manager or analyst needs that data in a spreadsheet, you'd normally write a script or reach for a library like SheetJS. This tool skips all that — paste the response, download the file, share it. It's useful for one-off data pulls, debugging API payloads, and building quick reports without spinning up any code.
Worked Example
Here's a real before-and-after. Input is a JSON array of product objects; output is the tab-separated data Excel will load:
Product Inventory JSON → Excel
JSON input (array of product objects):
Tab-separated output (opens in Excel as .xls):
What to Keep in Mind
This tool flattens one level deep — nested objects are stringified rather than expanded into sub-columns. The OOXML/ECMA-376 spec that drives modern .xlsx files is complex; the .xls format used here is simpler and universally supported. For advanced features like multiple sheets or formulas, a library like SheetJS is the right call.
Need a different output format? Try JSON to CSV for plain comma-separated output, JSON to XML for structured markup, JSON to YAML, or JSON to TypeScript to generate type definitions from your data.
Frequently Asked Questions
Does this generate a real .xlsx file?
It generates a tab-separated file saved with an .xls extension and the application/vnd.ms-excel MIME type. Excel, LibreOffice Calc, and Google Sheets all open it without complaints. For true OOXML .xlsx output (multiple sheets, formulas, formatting), you'd need a library like SheetJS in your project.
What JSON structure does this tool accept?
It expects a JSON array of objects — like what you'd get from a REST API or a database query. Each object becomes a row, and all unique keys across all objects become columns. Objects missing a key will have an empty cell for that column.
Does my data get sent to a server?
No. Everything happens in your browser using the Blob API and JavaScript. Nothing is uploaded, logged, or stored anywhere.
What happens with nested objects or arrays?
Nested values are serialized to a JSON string and placed in the cell as-is. For example, {"tags": ["a", "b"]} will appear as ["a","b"] in that column. If you need proper flattening, consider preprocessing with Array.flatMap() in your code first.
Can I use this with large JSON files?
Yes, for most real-world datasets (up to several MB) it works fine. The browser handles the conversion in memory. For very large files (tens of thousands of rows), you may notice a slight delay — if performance matters at scale, a server-side approach or a streaming library like SheetJS is more appropriate.
Why tab-separated instead of comma-separated?
Tab-separated values (TSV) are what Excel uses natively when you paste data directly. Commas in cell values don't need escaping with tabs, which makes the output cleaner and more reliable for direct paste-in. If you need CSV specifically, use the JSON to CSV tool.
Related Tools
Working with data in the browser? Check out MDN's JSON reference for full documentation on the JSON global object, including JSON.parse() and JSON.stringify().