Free · No signup · Private — runs in your browser

CSV to JSON

Turn a CSV file into a clean JSON array for APIs and code. The header row becomes object keys and each line becomes an object — processed entirely in your browser.

⇄

Drop your .csv file here or click to browse

Converted on your device — nothing is uploaded.

One file is free — drag in several to batch-convert with Pro.

Need to edit, not just convert? Open the full Gridoly editor →

How it works

1Add your CSVDrag a .csv file onto the box, or click to choose one.

2We convert itThe first row supplies the keys; each row becomes a JSON object.

3Download JSONDownload a formatted .json array, ready for your project.

Frequently asked questions

How is the JSON keyed?

By your CSV header row — the first line becomes the property names.

Is there a row limit?

No practical limit for typical files; very large files depend on your device memory.

Is my file uploaded?

No. Everything runs locally in your browser.

More free spreadsheet tools

CSV to ExcelConvert a .csv file into a clean Excel .xlsx workbook.Excel to CSVExport an Excel workbook to a clean .csv file.Excel to JSONConvert spreadsheet rows into a clean JSON array.JSON to CSVFlatten a JSON array of objects into a CSV.JSON to ExcelConvert a JSON array into an Excel .xlsx workbook.Merge Excel FilesCombine several Excel/CSV files into one workbook.Excel to PDFRender a spreadsheet to a clean, printable PDF.XLS to XLSXUpgrade a legacy .xls file to modern .xlsx.Remove Duplicate RowsStrip exact duplicate rows from a spreadsheet.TSV to CSVConvert tab-separated TSV/TXT into standard CSV.CSV to TSVConvert a CSV into a tab-separated TSV file.XLS to CSVExport a legacy .xls workbook to a clean CSV.XLS to JSONConvert a legacy .xls workbook into a JSON array.TSV to ExcelConvert tab-separated TSV/TXT into an Excel workbook.TSV to JSONConvert tab-separated TSV/TXT into a JSON array.JSON to TSVConvert a JSON array into a tab-separated TSV file.CSV to PDFRender a CSV file to a clean, printable PDF.ODS to XLSXConvert a LibreOffice .ods file to Excel .xlsx.ODS to CSVExport a LibreOffice .ods file to a clean CSV.XLSX to ODSConvert an Excel .xlsx workbook to LibreOffice .ods.CSV to ODSConvert a CSV into a LibreOffice .ods spreadsheet.Excel to HTMLConvert a spreadsheet into an embeddable HTML table.CSV to HTMLConvert a CSV into an embeddable HTML table.Combine CSV FilesStack several CSV files into one combined CSV.Remove Empty RowsStrip fully-blank rows from a spreadsheet.