TSV to CSV Converter
Convert tab-separated TSV files into standard comma-separated CSV files instantly with correct quoting. Free, no signup, works in your browser.
Everything runs inside your browser — your file is never uploaded to a server.
About this tool
Paste or upload a TSV file and this tool replaces tab delimiters with commas to produce a standard CSV file, automatically wrapping any field that contains a comma, quote, or line break in quotation marks so the result stays valid. TSV files are common exports from databases, spreadsheet tools and command-line utilities, but many downstream applications expect comma-separated files instead. This converter handles the delimiter swap correctly without corrupting fields that already contain commas, which a simple find-and-replace would break. It runs entirely as JavaScript in your browser, so exported data with sensitive business or personal information stays on your machine throughout the conversion. Once converted, copy the CSV text directly or download it as a ready-to-use .csv file.
How to use this tool
1. Add your TSV
Paste TSV text or choose a .tsv file from your device.
2. Preview the result
Check how the tab-separated data will look as CSV.
3. Convert
Click convert to switch delimiters and quote fields correctly.
4. Copy or download
Copy the CSV to your clipboard or download it as a .csv file.
Why use this tool
Many database exports and command-line tools output tab-separated files by default, but spreadsheet apps, import wizards and APIs often expect commas instead. This tool handles the conversion correctly, protecting fields that already contain commas, so you avoid a corrupted file from a naive find-and-replace approach.
Tips & best practices
- Always use a proper converter rather than a simple find-and-replace, since that can break fields containing commas.
- Check for stray tab characters inside quoted fields before converting, as they can shift column alignment.
- Preview the output to confirm columns line up correctly before downloading.
Common use cases
- Converting a database query export from tab-separated format into CSV for Excel.
- Preparing a TSV file from a command-line tool for a CSV-only import wizard.
- Turning a bioinformatics or scientific dataset from TSV into CSV for broader compatibility.
- Converting server log exports for use in spreadsheet-based reporting tools.
- Standardizing mixed TSV and CSV data sources into one consistent CSV format.
Frequently asked questions
Why would I need to convert TSV to CSV instead of just renaming the file?
TSV uses tabs and CSV uses commas as delimiters, so renaming the extension without converting the content produces a broken file.
What happens to fields that already contain a comma?
Those fields are automatically wrapped in quotation marks so the comma inside them isn't mistaken for a delimiter.
Does it handle TSV files with embedded line breaks in fields?
Yes, quoted multi-line fields are preserved correctly during the conversion to CSV.
Can I convert large TSV exports from a database?
Yes, though very large files depend on your browser's available memory since everything processes locally.
Is my TSV file uploaded to a server for conversion?
No, the conversion happens entirely in your browser and your file never leaves your device.
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