CSV vs TSV: What’s the Difference and When to Use Each
If you work with data files regularly, you’ve probably seen both CSV and TSV file formats. While they look similar and serve the same general purpose, there are important differences that determine when to use one over the other. This guide explains both formats clearly.
What Is a CSV File?
A CSV (Comma-Separated Values) file uses a comma as the delimiter between data values. It is the most widely supported format for exchanging tabular data and is the default export format for most tools and platforms.
Name,Email,Country
John,john@email.com,USA
Jane,jane@email.com,UKWhat Is a TSV File?
A TSV (Tab-Separated Values) file uses a tab character as the delimiter. TSV files have the extension .tsv or sometimes .txt. They look similar to CSV when opened in a viewer but use invisible tab characters between values.
Name[TAB]Email[TAB]Country
John[TAB]john@email.com[TAB]USA
Jane[TAB]jane@email.com[TAB]UKKey Differences: CSV vs TSV
| Feature | CSV | TSV |
|---|---|---|
| Delimiter | Comma (,) | Tab character |
| File extension | .csv | .tsv or .txt |
| Best for data with commas | No (needs quoting) | Yes (no conflict) |
| Tool support | Universal | Wide but less universal |
| Human readability | Good | Very good (aligned) |
| Database import | Excellent | Good |
When to Use CSV
Use CSV when: you need maximum compatibility across platforms and tools, your data does not contain commas within individual values, you’re exporting from standard business tools like Salesforce, HubSpot, or Shopify, or the receiving system specifically expects CSV.
When to Use TSV
Use TSV when: your data values frequently contain commas (like addresses, descriptions, or formatted text), you want to avoid complex quoting rules, you’re working with plain text processing tools, or you’re dealing with data that has natural tab-key formatting.
Can Our CSV Viewer Handle TSV Files?
Yes! Our free online CSV file viewer automatically detects whether your file uses commas, tabs, semicolons, or pipes as delimiters. Simply upload your TSV or CSV file and it will display correctly as a formatted table, regardless of which delimiter is used.