Convert JSON to XLSX Online Free
Drag & drop your .json file here, or click to browse
Converts to XLSX in your browser · first daily conversion free · no signup
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Transform JSON arrays of objects into Excel spreadsheets. Object keys become column headers and each object becomes a spreadsheet row. No server upload needed.
By ChangeThisFile Team · Last updated: March 2026
To convert JSON to XLSX, drop your .json file onto the ChangeThisFile converter. Object keys become Excel column headers and each array element becomes a spreadsheet row. This free tool creates real .xlsx files in your browser without uploading data to any server.
JSON vs XLSX: Format Comparison
Key differences between the two formats
| Feature | JSON | XLSX (Excel Spreadsheet) |
|---|---|---|
| Structure | Nested objects and arrays | Flat table with rows, columns, and sheets |
| Data types | Strings, numbers, booleans, null | Numbers, text, dates, formulas, booleans |
| Nesting | Unlimited depth | Not supported (flat cells) |
| Formatting | None (data only) | Fonts, colors, borders, conditional formatting |
| File size | Text-based, compact for small data | Binary ZIP, efficient for large datasets |
| Viewing | Code editors, JSON viewers | Excel, Google Sheets, LibreOffice |
| Programmatic use | Native in all programming languages | Requires SheetJS, openpyxl, or similar library |
When to Convert
Common scenarios where this conversion is useful
Creating reports from API data
Convert JSON API responses into Excel spreadsheets for business users who need to analyze data with pivot tables, charts, and formulas.
Sharing data with non-technical stakeholders
Transform JSON data exports into Excel files that managers, clients, or analysts can open and work with in Microsoft Excel or Google Sheets.
Building Excel templates from JSON configs
Convert JSON configuration data or product catalogs into structured Excel spreadsheets for editing, review, and re-import.
Archiving API data as spreadsheets
Convert JSON data dumps from APIs or databases into Excel format for long-term archival and offline access.
Who Uses This Conversion
Tailored guidance for different workflows
Office Workers
- Convert JSON documents to XLSX for sharing with colleagues who use different software
- Transform JSON reports to XLSX for archiving or distribution to external stakeholders
Students
- Convert JSON lecture notes to XLSX for submitting assignments in the required format
- Transform JSON study materials to XLSX for reading on tablets or e-readers
Professionals
- Convert JSON contracts or proposals to XLSX for secure, read-only distribution to clients
- Transform JSON templates to XLSX for use across different office suites and platforms
How to Convert JSON to XLSX
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1
Drop your JSON file
Drag and drop your .json file onto the converter, or click to browse. The file should contain an array of objects for best results.
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2
Instant conversion
Object keys are extracted as column headers in the first row. Each object in the array becomes a data row. Numeric types are preserved as Excel numbers.
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3
Download your XLSX
Click Download to save the .xlsx file. Open it in Excel, Google Sheets, LibreOffice, or any spreadsheet application.
Convert JSON to XLSX via API
Integrate this conversion into your pipeline with 3 lines of code. Free tier: 25 conversions/month.
The free converter above runs entirely in your browser — your file is never uploaded. This optional API is a separate server-side endpoint for automating conversions at scale.
curl -X POST https://changethisfile.com/v1/convert \ -H "Authorization: Bearer YOUR_API_KEY" \ -F "file=@input.json" \ -F "target=xlsx" \ -o output.xlsx --fail
YOUR_API_KEY with your free key — no credit card needed.
Frequently Asked Questions
Each unique key across all objects in the array becomes a column header in the first row of the spreadsheet. Objects missing a key get an empty cell.
Nested objects and arrays are converted to their JSON string representation in the cell. For better results, flatten your JSON data before converting.
Yes. JSON numbers become Excel numeric cells, so you can use them in formulas, charts, and calculations without conversion.
JSON true and false are converted to Excel boolean values (TRUE/FALSE), which work with Excel logical functions like IF and AND.
JSON null values become empty cells in the spreadsheet.
A single object is treated as a one-row spreadsheet. For multi-row output, your JSON should be an array of objects.
Columns appear in the order keys are first encountered in the JSON array. The first object's key order typically determines the column sequence.
Yes. Google Sheets fully supports .xlsx files. Upload the downloaded file to Google Drive and open it with Google Sheets.
The converter handles files with hundreds of thousands of records. Performance depends on your device's memory. Excel itself supports up to 1,048,576 rows.
Yes. The XLSX file is generated entirely in your browser using SheetJS. No data is uploaded to any server.
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