Free data and spreadsheet tools

Convert spreadsheets and data files between Excel, CSV, JSON, XML and YAML, and merge, split or tidy them.

No sign-up
No watermark
Files stay on your device

Organize pages

Merge ExcelCombine Excel files into one workbook.Split ExcelSave each sheet as its own Excel file.Merge CSVCombine several CSV files into one.Split CSVCut a big CSV into smaller files with headers.

Edit

JSON FormatterMake JSON readable and check it for errors.

Convert

Excel to CSVTurn an Excel sheet into a CSV file.CSV to JSONTurn spreadsheet rows into clean JSON objects.JSON to CSVOpen JSON data in Excel or Google Sheets.CSV to ExcelTurn a CSV into a proper Excel file.Excel to JSONTurn Excel rows into JSON objects.JSON to ExcelTurn JSON data into an Excel sheet.XLS to XLSXUpdate old Excel XLS files to XLSX.XLSX to XLSSave an Excel file in the old XLS format.ODS to XLSXTurn a LibreOffice ODS sheet into Excel.XLSX to ODSTurn an Excel workbook into ODS.XML to JSONTurn XML files and feeds into clean JSON.JSON to XMLTurn JSON data into well-formed XML.YAML to JSONTurn YAML config files into JSON.JSON to YAMLTurn JSON into clean, readable YAML.

Move data between programs without retyping it

Exports rarely arrive in the format you need. A bank or a shop gives you CSV and you want Excel; a developer needs JSON from a spreadsheet; a system wants XML or YAML; a file is too big to open, or there are twenty files that should be one. These tools convert between Excel (XLSX, XLS, ODS), CSV, JSON, XML and YAML, merge and split CSV files and format JSON so it can be read.

Separators, accents and dates are handled the way spreadsheets expect: semicolon or comma CSV, UTF-8 or old Windows encodings, dates kept as dates. The files are read in your browser, so customer lists and financial data never leave your computer.

Frequently asked questions

Why does my CSV look wrong in Excel?

Usually the separator or the character encoding does not match what Excel expects in your country. CSV to Excel detects both and writes a real XLSX file, so accents and columns come out right.

Can I convert a whole Excel workbook?

Yes. Excel to CSV can export the first sheet or every sheet, one CSV each, and Excel to JSON can give one object per sheet.

Is my data uploaded?

No. Spreadsheets and data files are converted in your browser on your own device, so nothing is sent to us or stored.