Excel (XLSX) to TSV Converter
Handles Up to 1 Million Rows

Convert Excel XLSX files to TSV (tab-separated) format instantly in your browser. Dates are preserved as ISO 8601, numbers stay accurate. No upload required.

Drag & drop your file here, or browse

Accepts: .xlsx (up to 200 MB)

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

How to Convert Excel (XLSX) to TSV

Drag and drop your XLSX file onto the drop zone at the top of the page, or click to browse and select a file.

Conversion starts automatically. Dates and numbers are detected and preserved in the TSV output.

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

Key Features of This XLSX to TSV Converter

100% Local Processing: Your files are never uploaded to a server. All conversion happens in your browser, so your sensitive data stays private.
Smart Date Detection: Excel date cells are automatically detected and converted to ISO 8601 format (YYYY-MM-DD). Built-in and custom date formats are recognized.
Free with No Limits: No row limits, no file count restrictions, and no account required. Start converting right away.

Excel (XLSX) vs TSV: When to Use Each Format

Excel (XLSX) stores data in a rich binary format with formatting, formulas, and multiple sheets. TSV is a simple tab-delimited text format ideal for data exchange.

	Excel (XLSX)	TSV
Structure	Multiple sheets, rich formatting	Single flat table
Delimiter	N/A (binary format)	Tab character
Compatibility	Excel, Google Sheets, LibreOffice	Universal (any text editor, database)
File size	Larger (ZIP-compressed XML)	Compact
Data fields with commas	Handled natively	No escaping needed (tabs as delimiter)

Benefits of Converting XLSX to TSV

No Comma Conflicts — TSV uses tabs as delimiters, so commas in data fields are never an issue.
Universal Compatibility — TSV files can be opened by any text editor, database, programming language, or spreadsheet application.
Data Pipeline Integration — Widely used in bioinformatics, linguistics, and data exchange between systems.

Frequently Asked Questions

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.

Can I convert large Excel files to TSV?

Yes. This tool uses an efficient SAX parser to process XLSX files without loading the entire document into memory. Files up to 200MB are supported.

Are dates preserved in the TSV output?

Yes. Excel date cells are detected and converted to ISO 8601 format (YYYY-MM-DD or YYYY-MM-DD HH:MM:SS) in the TSV output. Both built-in and custom Excel date formats are recognized.

Which sheet is converted?

The first sheet in the workbook is converted. Multi-sheet conversion is not currently supported.

Does the tool handle formulas?

Yes. The cached (evaluated) value of each formula cell is used in the TSV output. The formula text itself is not included.