Tab-separated files are the quiet workhorse of data exports: databases, analytics tools, lab software and plenty of developer utilities all emit .tsv files because tabs almost never appear inside the data itself. The trouble starts when the next tool in line — Excel on some settings, a shop platform, an email service, a government form — insists on comma-separated CSV instead. This free TSV to CSV converter switches the delimiter for you in seconds. Drop the file in or paste the text, check the row counts and a preview of the converted lines, then download a standard .csv with correct quoting throughout.
How to convert a TSV file to CSV
Drag your .tsv or .txt file onto the drop zone, or click the zone and choose it from your device — the conversion starts as soon as the file is read. If you only have the text, paste it into the box instead and press Convert pasted text; copying straight out of a spreadsheet works too, because spreadsheets put tab-separated data on the clipboard. Either way you get a result card with the row and column counts plus a preview of the first converted lines, so you can confirm the fields landed where they should. Press Download .csv and the file saves with the same base name as the original — export.tsv becomes export.csv — ready to open or import anywhere.
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, kept or logged while you convert, which is exactly what you want when the file holds exports you would rather keep private — customer records, sales figures, research data or internal logs. Server-based converters ask you to upload that data and trust a delete policy; this tool never takes the file off your device in the first place, and it still works offline once the page has loaded.
Tabs, commas and quoting: what changes and what does not
TSV and CSV carry exactly the same table — the only difference is the character between fields. Tabs are popular in exports because real data rarely contains a tab, so TSV files usually need no quoting at all. Commas are different: ordinary text is full of them, so the CSV writer quotes every field that contains a comma, a quote or a line break, and doubles any quotes inside it, following the standard CSV rules that Excel and import tools expect. A TSV note like Hello, world therefore arrives in the CSV safely wrapped in quotes as a single field, while values without commas stay unquoted and clean. Numbers, dates and text in any language pass through unchanged — only the separators move. One case to watch: if a field contains a literal tab character inside it, TSV cannot represent it unambiguously, which is one more reason CSV is the safer exchange format.
Limits and practical tips
Files up to 10 MB convert comfortably, covering hundreds of thousands of rows. Before converting, make sure every row has the same number of fields and that tab characters inside your data have been removed or replaced, since a stray tab silently shifts the columns of that row. Save the source as UTF-8 so accented characters and other scripts arrive intact, and glance at the preview: the first lines tell you immediately whether the delimiter was read correctly. If your “TSV” was exported from Excel with a different extension, renaming a copy to .tsv or .txt lets the tool accept it.
TSV to CSV Converter – frequently asked questions
Is this TSV to CSV converter free?
Yes. It is completely free, needs no sign-up, and you can convert as many files as you like, one at a time.
Will values that contain commas survive the conversion?
Yes. Fields containing commas are automatically wrapped in double quotes in the CSV output, exactly as the CSV standard requires, so they import as single values everywhere.
Can I convert without a file, just copied text?
Yes. Paste tab-separated text into the box — including text copied straight from a spreadsheet — and press Convert pasted text to get the same downloadable CSV.
Is my file 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.
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Versión en español: Convertir TSV a CSV gratis – Pasa archivos con tabulaciones a comas. You may also like: JSON to XLSX Converter – Turn JSON Data into Excel Files Free · CSV to HTML Table Converter – Turn CSV Files into Web Tables Free.
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