Comma-separated CSV is the world’s default data format, but commas are also one of its biggest weaknesses: they appear inside ordinary text all the time, forcing fragile quoting rules that sloppy tools keep breaking. Tab-separated TSV sidesteps the problem, which is why databases, bioinformatics pipelines, analytics exports and developer tools so often prefer it. This free CSV to TSV converter swaps the commas for tabs in seconds. Drop your file in or paste the text, check the row counts and a preview of the converted lines, then download a clean .tsv whose values need almost no quoting at all — ready for spreadsheets, scripts and data pipelines.
How to convert a CSV file to TSV
Drag your .csv or .txt file onto the drop zone, or click the zone and choose it from your device — the conversion runs as soon as the file is read. If you only have the text, paste it into the box and press Convert pasted text. Either way, a result card shows the row and column counts and a preview of the first converted lines; tabs show up as wide gaps in the preview, which is normal. Check that the columns line up, then press Download .tsv. The new file keeps the original base name — sales.csv becomes sales.tsv — and opens directly in Excel, Google Sheets and LibreOffice, all of which detect tab-separated files on sight.
Your data never leaves your device
The conversion runs locally in your browser: your files are converted on your own machine and never uploaded to any server. Nothing is transmitted, stored or logged at any point. That matters when the CSV holds data you would rather not hand to a stranger’s server — customer exports, order histories, survey answers or internal reports. A server-side converter would ask you to upload the file and trust its retention policy; here the file never leaves your device, the result is generated in the same tab, and closing the page ends the story.
Why switch from commas to tabs?
Both formats hold the same table; only the separator changes. Tabs almost never occur naturally inside names, addresses and descriptions, so a TSV file needs virtually no quoting: a value like Hola, mundo that CSV must wrap in quotes can stand bare between two tabs, which makes the file easier for scripts to read line by line and far less likely to break in a naive parser. The converter handles the edge cases by the book: a field that itself contains a tab is wrapped in double quotes in the output, so reading the TSV back returns exactly the original values, and fields with commas keep their commas untouched — commas are simply ordinary characters in TSV. Quoted commas, doubled quotes and line breaks inside quoted CSV fields are all parsed correctly on the way in, so what you see in the preview is the true table, not a guess.
Limits and practical tips
Files up to 10 MB convert comfortably — hundreds of thousands of ordinary rows. Keep every row’s field count consistent, because a missing separator shifts that row’s columns in any delimiter format. Save exports as UTF-8 so accented characters and other scripts survive intact, and glance at the preview before downloading: if the columns look stretched, the source may actually be semicolon-separated (common in European Excel exports), and re-exporting with commas or tabs fixes it. Note that some tools still insist on a .txt extension for tab-separated files; the content is identical, so renaming the download is safe.
CSV to TSV Converter – frequently asked questions
Is this CSV to TSV converter free?
Yes. It is completely free, needs no sign-up, and you can convert as many CSV files as you like, one at a time.
What happens to values that contain commas?
They keep their commas and lose their quotes. Commas are ordinary characters in TSV, so a value like “Hola, mundo” is written as a single field with no quoting needed.
What if a value contains a tab character?
That field is wrapped in double quotes in the TSV output, following the standard quoting rules, so any tool that reads the file back recovers the original value exactly.
Is my CSV uploaded to a server?
No. The files are converted locally in your browser and never uploaded, so your data stays on your device from start to finish.
Related tools
Versión en español: Convertir CSV a TSV gratis – Pasa archivos con comas a tabulaciones. You may also like: TSV to CSV Converter – Switch Tab-Separated Files to CSV Free · CSV to XLSX Converter – Turn CSV Files into Excel Workbooks Free.
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