TSV to Excel (XLSX) Converter
Paste from Spreadsheets or Upload TSV Files

Convert TSV files to Excel XLSX format instantly in your browser. Paste from spreadsheets or upload files.

Drag & drop your file here, or browse

Accepts: .tsv (up to 200 MB)

Max 10 million cells (rows × columns)

Your data stays in your browser. By using this tool, you agree to our Terms and Privacy Policy.

How to Convert TSV to Excel

Drag and drop your TSV file, or switch to the "Paste Text" tab and paste tab-separated data from Excel or Google Sheets.

Conversion starts automatically and a preview is displayed.

Click the "Download XLSX" button to save the converted result.

Key Features

100% Local Processing: Your files are never uploaded to a server. All conversion happens in your browser using WebAssembly, so your sensitive data stays private.
Paste from Spreadsheets: Copy cells from Excel or Google Sheets and paste directly to create an XLSX file. No need to save a TSV file first.
Proper Cell Formatting: Numbers, dates, and text are detected and formatted appropriately in the Excel output.

TSV vs Excel (XLSX): Key Differences

TSV (Tab-Separated Values) is a plain text format, while XLSX is a rich spreadsheet format supporting formatting, formulas, and multiple sheets.

Feature	TSV	XLSX
Format	Plain text	Rich spreadsheet (ZIP/XML)
Formatting	None	Fonts, colors, borders
Formulas	Not supported	Full formula support
Multiple Sheets	No	Yes

Benefits of Converting TSV to Excel

Excel files can be opened and edited in Microsoft Excel, Google Sheets, and LibreOffice.
XLSX supports rich formatting, making data easier to present and share.
Excel format is often required for business reports and data submissions.

Frequently Asked Questions

How do I use this tool?

Simply drag and drop your CSV file onto the drop zone at the top of the page, or click to browse and select a file. Conversion starts automatically, and you can download the JSON file once it's complete.

Can this tool handle large files?

Yes. This tool uses DuckDB-WASM to process files entirely in your browser using WebAssembly. It can handle large files depending on your device's available memory.

Is my data uploaded to a server?

No. Your file never leaves your browser. All processing happens locally using WebAssembly. No data is sent to any server.

What browsers are supported?

Any modern browser that supports WebAssembly: Chrome, Firefox, Edge, Safari (14+). Chrome is recommended for best performance with large files.

Is it free?

Yes, this tool is completely free with no row limits.