TSV to CSV Converter

Free Online TSV to CSV Converter

TSV (tab-separated values) and CSV (comma-separated values) are nearly identical formats — the only difference is the delimiter character. Yet many tools accept one but reject the other. Excel, database exports, and browser copy-paste operations often produce tab-delimited data, while Google Sheets, CMS platforms, and email marketing tools expect comma-delimited CSV. Our free TSV to CSV converter handles the swap correctly with proper RFC 4180 quoting.

A naive find-and-replace of tabs with commas breaks when field values contain commas, quotes, or line breaks. This tool handles all edge cases automatically. Upload a .tsv or .txt file, paste your data directly, or choose from tab, pipe, semicolon, or any custom delimiter string. Everything runs in your browser with no server uploads. It is the reliable alternative to opening Excel, re-saving as CSV, and hoping the formatting survives intact.

How to Use the TSV to CSV Converter

Paste your tab-separated data into the input area or click Upload File to load a .tsv or .txt file from your device. Select the input delimiter from the dropdown — tab (default), pipe, semicolon, or a custom string like :: or ~. The tool parses each row, handles quoted fields with embedded delimiters, and outputs properly formatted CSV with commas as separators and RFC 4180 compliant quoting. Copy the CSV output to your clipboard or paste it directly into Google Sheets, your CMS, or any tool that requires comma-separated data.

Who Uses a TSV to CSV Converter?

• Data analysts convert database exports from TSV to CSV for tools that only accept comma delimiters.
• Marketing professionals transform tab-delimited contact lists into CSV for email platforms and CRM imports.
• Developers convert clipboard data copied from browser tables into CSV for testing and seeding.
• Researchers reformat tab-delimited scientific datasets for statistical software that expects CSV.
• Administrative staff convert Excel TSV exports to CSV for upload into web-based form tools.
• Students reformat assignment data exports to meet submission format requirements.
• HR professionals convert employee data exports from HR systems to CSV for payroll tools.

Key Features

• Converts tab, pipe, semicolon, and custom delimiters to CSV
• RFC 4180 compliant quoting for fields with commas and quotes
• Upload .tsv and .txt files up to 500,000 characters
• Normalizes Windows (CRLF), Unix (LF), and Mac (CR) line endings
• Custom delimiter support for non-standard separators
• 100% browser-based — data never leaves your device

Tips for TSV to CSV Conversion

Never use find-and-replace to convert tabs to commas manually — field values containing commas will break the column structure. If your data uses an unusual separator like double colons or tildes, select Custom from the delimiter dropdown and type the exact separator string. Check the first few rows of output after conversion to verify column alignment, especially with data that contains quoted text or embedded newlines. For very large datasets, the 500,000 character limit applies — split oversized files before converting. After conversion, open the CSV in a spreadsheet application and spot-check a few rows to confirm column alignment, especially with data containing quoted text or embedded newlines. European number formats with commas as decimal separators are preserved as-is in the quoted CSV output. If your source data uses a BOM (byte order mark), the tool handles it automatically without corrupting the first column header.

Frequently Asked Questions