TSV to CSV Converter
Convert TSV (tab-separated values) to standard CSV instantly in your browser — ready for spreadsheets and tools that expect commas.
What Is TSV to CSV Conversion?
TSV (Tab-Separated Values) and CSV (Comma-Separated Values) both store tabular data as plain text rows and columns — the only real difference is the character that separates one column from the next. TSV uses a tab character; CSV uses a comma.
TSV shows up most often as an export format from spreadsheet apps, databases, and command-line tools, because tabs rarely appear inside real data, which sidesteps a whole class of quoting headaches CSV has to solve with commas. CSV, on the other hand, is the format almost every spreadsheet app, database import tool, and data pipeline expects by default.
Why Convert to CSV?
- Most spreadsheet software (Excel, Google Sheets) and database import tools default to CSV, not TSV.
- Many APIs and data-processing tools that accept "CSV upload" don't actually accept tab-delimited files.
- CSV is the more universally recognized of the two formats, even though TSV is arguably simpler to parse.
How This Tool Works
Paste your tab-separated data and the conversion happens instantly in your browser. Each tab becomes a comma, and any value that itself contains a comma, quote, or newline is automatically wrapped in quotes so the result is a valid CSV file. Nothing is uploaded — your data never leaves your device.
TSV vs CSV — When to Use Each
Both formats do the same job — the difference is almost entirely about which one the tool on the other end expects.
| Feature | TSV | CSV |
|---|---|---|
| Delimiter | Tab character | Comma |
| Quoting needed for delimiter in data | Rarely (tabs are uncommon in real data) | Often (commas are common in real data) |
| Default export format | Databases, command-line tools | Spreadsheets, most import/export tools |
| Tool support | Narrower | Nearly universal |
| Readability in a plain text editor | Columns don't visually align without a monospace font | Similar |
Keep TSV When
- You're passing data between command-line tools or scripts that already expect tabs
- Your data commonly contains commas, and you'd rather avoid comma-quoting entirely
Convert to CSV When
- You're importing into a spreadsheet app or database tool that expects comma-delimited files specifically
- An API or upload form says "CSV" and rejects tab-delimited input
- You want the more broadly recognized format for sharing with someone else
Common Scenarios for TSV to CSV Conversion
Importing a Database Export into a Spreadsheet
Many databases and BI tools export query results as TSV by default. When you need to open that export in Excel or Google Sheets, or hand it to someone who expects a "CSV file," converting the delimiter first avoids a garbled single-column import.
Uploading to a Tool That Only Accepts CSV
Plenty of upload forms and APIs are labeled "CSV upload" but reject tab-delimited files outright, even though the data is otherwise identical. Converting your TSV export to CSV first is often the quickest fix, faster than re-exporting from the original source if that option isn't readily available.
Feeding Command-Line Output into a Spreadsheet Workflow
Command-line tools (cut, awk, database CLIs) commonly output tab-separated data. If the next step in your workflow is a spreadsheet or a CSV-based pipeline, converting bridges that gap without needing to rewrite the original export.
Assembling a Final Report
If you're combining a converted CSV export with a cover page or written summary into a single deliverable, our PDF Merge tool can combine multiple PDFs into one document once each piece is ready.
Standardizing Mixed-Format Data Exports
When you're collecting exports from several different sources — some TSV, some already CSV — converting everything to CSV first gives you one consistent format to work with before combining or processing the data further.
Other Ways to Convert TSV to CSV
You can also convert TSV to CSV by importing it into a spreadsheet app like Excel or Google Sheets and saving as CSV, or with a short script using your language's TSV and CSV libraries. FileCast is useful for a quick, one-off conversion.
Frequently Asked Questions
Is it safe to convert my data here?
Yes. This tool runs entirely in your browser. Your file is read and processed on your own device — nothing is uploaded to a server. Once you close or refresh the page, the data is gone.
What if a value already contains a comma?
Any value that contains a comma, a quote character, or a newline is automatically wrapped in double quotes in the output, exactly as the CSV standard (RFC 4180) requires. This keeps the converted file valid even when your data has commas of its own.
What if my TSV file has quoted fields?
Quoted fields are supported. If a value in your TSV data is wrapped in double quotes — including quotes containing a literal tab or newline — the tool parses it correctly rather than splitting it apart.
Does the first row need to be a header row?
No. This tool converts every row the same way, whether or not the first one is a header. If your data has a header row, it will simply become the first row of the resulting CSV.
Can I convert multiple files at once?
This tool processes one file at a time. If you have several TSV files to convert, run each one through individually so you can review each result before moving on to the next.