API fixture preparation
Turn spreadsheet rows into JSON arrays for test payloads, import scripts, or mock servers.
CSV / Excel to JSON
Upload CSV or Excel files and convert spreadsheet rows into clean JSON arrays in the browser.
Waiting for a spreadsheet.
JSON output
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How to use this tool
A quick workflow so you can get the result you need without guesswork.
- 1
Upload a CSV, XLS, or XLSX file from your device.
- 2
Choose a worksheet if the file contains more than one sheet.
- 3
Convert the rows into JSON and copy or inspect the output directly in the browser.
Useful examples
Practical cases where this utility saves time and reduces mistakes.
No-code data cleanup
Convert business spreadsheets into JSON without writing a one-off script.
Migration planning
Inspect spreadsheet data as JSON before moving it into a database, CMS, or automation workflow.
Frequently asked questions
Short answers to the most common questions about the calculator above.
Which file types are supported?
The converter supports CSV files as well as common Excel formats such as XLS and XLSX.
How does the JSON structure look?
Rows are converted into an array of objects using the first row as the column header set.
Can I choose a worksheet from an Excel file?
Yes. Once the workbook loads, the tool lets you pick which sheet to convert.
Is the spreadsheet uploaded anywhere?
No. Parsing and conversion happen in your browser.
Convert Spreadsheets and CSV Files into JSON Arrays
This CSV and Excel to JSON converter turns rows from spreadsheets into JSON objects directly in the browser. It is useful when you need data for APIs, scripts, migrations, fixtures, or no-code automation tools that prefer JSON input.
You can upload CSV, XLS, or XLSX files, pick the worksheet you want, and inspect the resulting JSON immediately. That makes it a practical bridge between spreadsheet workflows and developer-oriented formats.
Useful for Imports, Fixtures, and Migration Work
Many datasets start life in spreadsheets but need to end up in databases, APIs, or configuration files. A focused converter saves time when the task is just to turn rows into structured JSON without writing a custom parser.
Because the file stays local to the browser, it is also convenient when the spreadsheet contains internal work-in-progress data.
Related tools
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