JSON to Excel Converter
Free online JSON to Excel converter.
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What is JSON to Excel Converter?
A JSON to Excel converter is a tool that transforms JSON data — typically an array of objects returned by an API or exported from a database — into a .xlsx spreadsheet where each object becomes a row and each key becomes a column. This converter runs entirely in your browser: it parses the JSON, infers the column set from all keys present, writes native number and boolean cells, and packages a valid Office Open XML workbook locally using JavaScript, without uploading anything.
Key Benefits
- Turn API responses into shareable spreadsheets for analysts and stakeholders in seconds
- Numbers and booleans survive as real typed cells, so formulas and pivot tables work out of the box
- Nested JSON is flattened into dot-notation columns like address.city automatically
- Private and offline — nothing is uploaded, which matters for customer and business data
- No sign-up, no file-size round trips, and no dependency on Excel being installed
Common Use Cases
- •Converting REST API responses into spreadsheets for business reporting
- •Preparing JSON exports from databases (MongoDB, Firebase) for Excel-based analysis
- •Sharing data with non-technical teammates who live in spreadsheets
- •Creating quick backups of JSON fixtures or config exports in a readable grid
- •Auditing large JSON datasets with row, column, and cell counts before import
How to Convert JSON to Excel
- Paste or upload your JSON: Paste a JSON array of objects into the input box, or click Upload to load a .json file from your computer. You can also drag and drop the file onto the textarea.
- Review the parse preview: The tool instantly validates your JSON and shows a live preview table with row, column, and cell counts. Fix any syntax errors flagged in the message box before exporting.
- Choose flattening and names: Keep Flatten enabled to turn nested objects like address.city into their own columns. Set the sheet name (max 31 characters) and the output file name as you like.
- Download the XLSX file: Click Download XLSX. The spreadsheet is generated in your browser with typed cells and a styled header row, then saved straight to your downloads folder — no server involved.
Key Features
- Converts JSON arrays of objects into spreadsheet rows using the union of all keys as the header.
- Native number and boolean cell types so Excel formulas like SUM and AVERAGE work immediately.
- Optional dot-notation flattening maps nested objects such as address.city onto their own columns.
- One-click .xlsx download with customizable sheet name and file name.
- Live preview table with row, column, and cell counts before downloading.
- Handles single objects and arrays of primitives, and nulls become empty cells.
Frequently Asked Questions
How do I convert a JSON file to Excel?
Open the JSON to Excel Converter, click Upload to select your .json file (or paste the JSON), review the live preview, then click Download XLSX. The conversion runs entirely in your browser, so your file is never uploaded anywhere.
Does the tool keep numbers as real numbers in Excel?
Yes. Numeric JSON values are written as native numeric cells and booleans become TRUE/FALSE, so formulas like SUM, AVERAGE, and COUNT work immediately without reformatting columns.
What happens to nested objects and arrays?
With Flatten enabled (the default), nested objects are expanded into dot-notation columns — for example, address.city becomes its own column. If a value is still an object or array (like tags in an array of strings), it is written as compact JSON text in the cell.
Is my JSON data uploaded to a server?
No. The whole conversion — parsing, spreadsheet generation, and the .xlsx download — happens locally in your browser with JavaScript. The page works offline once loaded, making it safe for sensitive or customer data.