Convert TSV to CSV Online

Convert tab-separated values to standard CSV — or any other delimiter.

TSV → CSV

Free TSV to CSV converter. Paste tab-separated data and get a properly formatted CSV file. Works in your browser with no upload.

100% local — no uploads

Input · TSVUpload file

Output will appear here

Paste or upload your TSV data
Paste text directly into the input box, drag and drop a file onto it, or click "Upload file" to browse. Conversion starts instantly on paste — no button click required.
Configure options (optional)
Open the Options panel to customise delimiter, headers, nested-object flattening, and more. Use the Field Selector to pick exactly which columns appear in the output.
Copy or download your CSV
Click Copy to grab the result, or Download to save the file. Everything runs locally in your browser — no data ever leaves your device.

Is my data safe?: Yes. Every conversion runs entirely inside your browser. No data is ever transmitted to a server. The tool works offline once loaded.
What is the maximum file size?: There is no hard limit. Files under 1 MB convert instantly. Files 1–10 MB show a progress indicator. Files over 10 MB prompt a warning and run in a background thread to keep the browser responsive.
Why does my TSV fail to parse?: Common causes are trailing commas, single-quoted strings, unquoted keys, or missing closing brackets. The converter auto-repairs many of these and tells you exactly what it changed.
Can I convert multiple files at once?: The tool handles one file at a time. For bulk conversion, consider the csvjson CLI or API.

Step 1

Any fields containing commas in the original TSV are quoted in the CSV output so the structure is preserved.

Database export to CSV

Input

id	name	city
1	Alice	New York
2	Bob	San Francisco

Output

id,name,city
1,Alice,New York
2,Bob,San Francisco

How are fields with commas in the tab-separated data handled?

They're automatically quoted in the CSV output, so `New York, NY` becomes `"New York, NY"` — preserving the value.

All conversions run in your browser — nothing is uploaded.