Data converters
Spreadsheet & data converter tools
Free online tools to convert between Excel, CSV, JSON, and TSV formats. All processing happens in your browser — your files never leave your device.
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JSON to Excel
Paste a JSON array and download it as an XLSX file.
📋Excel to JSON
Upload an Excel file and convert it to structured JSON.
📑CSV to Excel
Paste or upload CSV data and convert it to XLSX.
📄Excel to CSV
Upload an Excel workbook and download a sheet as CSV.
📈TSV to Excel
Convert tab-separated data into a downloadable XLSX file.
📝Text to Table
Paste delimited text and preview it as a sortable table.
🗂️JSON to Table
Paste a JSON array and view it as an interactive table.
🔄JSON to CSV
Convert JSON arrays to CSV format for spreadsheets.
Frequently asked questions
- Are my files uploaded to a server?
- No. All conversions happen entirely in your browser using JavaScript. Your files never leave your device.
- What file formats are supported?
- You can convert between Excel (.xlsx, .xls), CSV, TSV, JSON, and plain delimited text. The tools handle headers, special characters, and multiple sheets where applicable.
- Is there a file size limit?
- Files up to 5 MB work well in the browser. Larger files may be slow due to browser memory limits. For very large datasets, consider splitting the file first.