Free · No signup · Private — runs in your browser

Merge Excel Files

Combine several Excel or CSV files into a single .xlsx workbook — every sheet from every file, kept separate and named. Fast, private and free, right in your browser.

⊕

Drop two or more files here or click to browse

Combine .xlsx, .xls and .csv — each sheet kept separate.

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

How it works

1Add your filesDrag two or more .xlsx, .xls or .csv files onto the box at once.

2We combine themEvery sheet from every file is appended into one workbook, with unique names.

3Download workbookDownload a single merged .xlsx containing all your sheets.

Frequently asked questions

How are sheets named?

Each sheet keeps its original name; duplicates get a numbered suffix so nothing is overwritten.

Can I merge CSV and Excel together?

Yes — mix .csv, .xls and .xlsx in one merge. Each CSV becomes a sheet.

Are my files uploaded?

No. The merge runs entirely 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.CSV to JSONConvert a CSV into a JSON array keyed by its header.JSON to ExcelConvert a JSON array into an Excel .xlsx 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.