TSV to XLS Converter
Processing entirely on your device — large files may take a moment.
Tab-Separated Values and Excel 97-2003 Workbook exist for different jobs: TSV (Tab-Separated Values) is CSV’s cousin that uses tab characters as separators — common in bioinformatics, data-warehouse exports and Excel clipboard data. Opening legacy .xls exports in modern tools is easiest after converting them to XLSX or CSV.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How TSV compares to XLS
| TSV | XLS | |
|---|---|---|
| Structure | One flat table | Multiple sheets (BIFF8) |
| Types / schema | Untyped | BIFF8 typed cells |
| Compatibility | Spreadsheets paste natively | Legacy Excel systems |
| Best for | Quick spreadsheet exchange | Reading historical workbooks |
How to convert TSV to XLS
- 1
Select your files
Drag & drop your TSV files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to XLS". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted XLS file individually, or grab everything at once as a ZIP archive.
About the TSV format
TSV is CSV's tab-separated sibling: rows as lines, columns split by tabs, everything plain text. Its quiet superpower is the clipboard — copy a range in Excel or Sheets, paste into a text editor, and you are looking at TSV; paste it back and the grid restores. That round-trip makes it the Lingua franca of ad-hoc spreadsheet work.
The tab delimiter avoids CSV's comma-in-text quoting dance, at the price of being broken by any value that itself contains a tab — there is no standard quoting. Like CSV it is untyped, single-table, and happiest as a quick exchange or import format.
+Strengths
- ✓Round-trips through the clipboard with spreadsheets
- ✓No quoting rules to worry about
- ✓Columns align visually in monospace editors
!Limitations
- −A tab inside any value corrupts the file
- −Untyped and single-table like CSV
- −Some tools assume CSV only
About the XLS format
XLS is the legacy Excel binary format (BIFF8, Excel 97–2003). It does everything its era supported — sheets, formulas, formatting, VBA macros — under hard limits: 65,536 rows and 256 columns per sheet. Millions of government, banking and manufacturing templates were built on it, which is why it still arrives in inboxes.
There is no reason to create new XLS files: XLSX handles everything better with no row ceiling. The realistic use case is reading — opening or converting historical files, or feeding systems whose import filters predate 2007.
+Strengths
- ✓The only format ancient Excel-era systems accept
- ✓Full BIFF8 feature set: formulas, macros, formatting
!Limitations
- −65,536-row and 256-column ceiling per sheet
- −Obsolete binary spec, awkward for modern tools
- −Macro-enabled files carry security risk
Why convert TSV to XLS?
Think of it as moving your file to the container that fits the job. A tab inside any value corrupts the file XLS works differently: The only format ancient Excel-era systems accept If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this TSV to XLS converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
What about special characters and non-English text?
Everything is handled as UTF-8. When you export CSV for Excel, a UTF-8 BOM is included automatically so Chinese, Japanese, Korean and accented characters display correctly on both Windows and macOS.
Are formulas, styles or multiple sheets converted?
No — this conversion extracts the data itself into XLS. Formulas are exported as their current values, styling is not carried over, and multi-sheet workbooks convert sheet by sheet. For full fidelity between spreadsheet formats, exchange within the same tool family.
How large can my TSV file be?
Since everything runs locally in your browser, the real limit is your device memory rather than an upload cap. Files up to a few hundred megabytes are usually fine on a modern computer; extremely large ones simply take longer.