TSV to CSV Converter

The TSV to CSV Converter takes tab-separated data and rewrites it as standards-compliant comma-separated values. As it converts, it automatically wraps any field that contains a comma, a quote or a line break in double quotes and escapes inner quotes, so the resulting CSV is valid and safe to open in any spreadsheet or import into any database.

This tool is aimed at analysts, developers and data engineers who receive tab-delimited exports, often copied directly from a spreadsheet, but need the more widely supported CSV format. Rather than manually replacing tabs with commas and hoping no field already contains one, you paste the TSV and get correctly quoted CSV that respects the structure of your data.

Everything runs locally in your browser using a robust parser and serialiser, so no rows are uploaded. You paste your tab-separated text, optionally choose which delimiter the output should use, and immediately receive clean CSV with proper quoting applied only where it is actually needed.

Features

• Reads tab-separated input reliably, treating each tab as a field boundary and each line as a row.
• Quotes only the fields that need it, wrapping values that contain commas, quotes or newlines so the CSV stays valid.
• Escapes double quotes inside a field by doubling them, following the RFC 4180 convention that all tools understand.
• Lets you choose comma, semicolon or pipe as the output delimiter to match the tool that will consume the file.
• Preserves your original row and column order, producing CSV that mirrors the structure of the source data exactly.
• Reports the number of rows and the widest column count so you can confirm nothing was lost in conversion.
• Skips empty lines so blank rows in the source do not create confusing gaps in the converted output.
• Runs fully in your browser with no uploads, keeping confidential tab-separated exports on your own device.

How to use TSV to CSV Converter

1. Paste your tab-separated data into the input box, or upload a .tsv, .txt or .csv file from your device.
2. If you copied the data from a spreadsheet, it is already tab-separated, so you can paste it directly.
3. Choose the output delimiter, leaving it as comma for standard CSV or picking semicolon or pipe if your target tool needs it.
4. Watch the quoted CSV output appear live in the output panel as soon as the converter finishes parsing.
5. Check the row and column stats to confirm the conversion preserved every field in the right place.
6. Copy the CSV result or download it as a file, ready to open in a spreadsheet or import into a database.

Benefits

• Analysts turn data copied from a spreadsheet into a CSV file that other applications and colleagues can open easily.
• Developers produce RFC 4180-compliant CSV for libraries and importers that expect commas rather than tabs.
• Data engineers convert tab-delimited exports into the comma-separated format many ingestion pipelines require.
• Teams share data in the most universally supported text format, since almost every tool can read standard CSV.
• Anyone whose fields contain commas gets correct automatic quoting, avoiding the broken columns that naive conversion causes.
• Privacy-conscious users convert sensitive tab-separated data locally rather than uploading it to a remote converter.

The trickiest part of converting tab-separated data to CSV is handling fields that already contain a comma. A naive find-and-replace of tabs with commas would corrupt those rows, because the new commas become indistinguishable from the field separators. This converter avoids that entirely by parsing the tab structure first and then quoting any value that contains a comma, a quote or a newline, exactly as the CSV standard requires.

Quoting is applied selectively rather than to every field, which keeps the output clean and human-readable. A simple value like a name or a number is written as-is, while only values that would otherwise be ambiguous are wrapped in double quotes. Inner quotes are escaped by doubling them, which is the convention RFC 4180 defines and which every compliant CSV reader understands.

You can change the output delimiter to a semicolon or pipe when the consuming tool expects one, which is common with spreadsheets configured for regions that use the comma as a decimal separator. All conversion happens locally in your browser, so nothing you paste is uploaded, and the tool changes only the delimiter and quoting rather than the meaning of your data.