CSV to Excel

Convert CSV or TSV into a real .xlsx file, or an Excel file back into CSV or JSON.

Runs in your browser. Nothing is uploaded.

Direction

Drag & drop a file here, or click to browse

.csv, .tsv or .xlsx · up to 100MB

How to use

CSV to Excel in 3 steps

Pick a direction

Choose CSV/TSV → Excel, or Excel → CSV/JSON.

Add your file

Drop a .csv, .tsv or .xlsx file onto the drop zone. The first 20 rows preview instantly in a table.

Convert and download

Click Convert & download to get a real .xlsx workbook, or a clean CSV/JSON file.

Features

Why use this CSV to Excel

Produces a genuine .xlsx workbook, not a renamed CSV.

Also converts the other way — Excel back to CSV or JSON.

Live preview of the first 20 rows before you download.

Handles both comma-separated (CSV) and tab-separated (TSV) input automatically.

FAQ

Questions about this tool

Does this support multiple sheets?

When converting from Excel, only the first sheet is used for the CSV/JSON preview and export — multi-sheet workbooks are read but this tool focuses on single-table conversion.

How is a TSV file detected?

Files ending in .tsv, or CSV content where tabs are clearly the dominant separator, are parsed as tab-separated automatically — no manual setting needed.

Will special characters and accents be preserved?

Yes, files are read and written using proper text encoding, so accented characters, currency symbols and other Unicode text come through correctly.

What does the JSON output look like?

Each row becomes one JSON object, with your header row's values used as the property names — the result is a single JSON array ready to use in code.