Should I use CSV or TSV for data set?

Publish: 07.09.2023
Updated: 25.12.2023 17:37

Whether to prefer CSV (Comma-Separated Values) or TSV (Tab-Separated Values) largely depends on your specific needs, the nature of your data, and the systems and tools you are using. Below we outline the potential advantages and considerations for each format to help you make your decision:

CSV (Comma-Separated Values)


  • Wide Support: CSV is a very popular format, supported by a wide array of tools, utilities, and systems.
  • Compact: Generally takes up less space than TSV because a comma is a single byte, while a tab character is equivalent to several spaces.
  • Standardization: More standardized compared to TSV, leading to better consistency in handling special characters and escape sequences.


  • Data Complexity: If your data contains many commas, you may run into issues with field delineation. You will need to employ quoting strategies, which can complicate both reading and writing files.
  • Limited Typography: Since it uses commas to separate data fields, it can sometimes be less human-readable, particularly when data fields contain commas or line breaks.

TSV (Tab-Separated Values)


  • Human-Readable: TSV often offers better readability in a text editor because fields are visually separated with wider gaps.
  • Handling Commas: If your data contains a lot of commas, using TSV can avoid the need for escape characters, making the file simpler and easier to work with.
  • Simple Parsing: It’s often simpler to parse TSV programmatically because you’re less likely to encounter ambiguous cases caused by embedded delimiter characters.


  • Data Complexity: If your data contains tab characters, you will face the same problems that CSV has with embedded commas, necessitating escape sequences.
  • Space: TSV files can potentially be larger than CSV files because tab characters take up more space than commas.

General Tips for Choosing Between CSV and TSV

  • Existing Systems: Consider the default or preferred formats of any existing systems or tools you’re using. Some systems may work better with one format over the other.
  • Data Inspection: Inspect your data beforehand. If it contains many commas, TSV might be preferable, and vice versa.
  • Flexibility and Simplicity: If you prioritize flexibility and simplicity in parsing, TSV might be slightly preferable.
  • Community Standards: Consider any community standards or conventions in your field. In some domains, one format might be more standard than the other.


In conclusion, the best approach is to consider the specific context in which you are working, including the nature of your data and the tools you are using. Generally, either format can work well, and both CSV and TSV are widely used for a good reason. It’s always a good practice to be adept at working with both formats, as this will give you the flexibility to choose the best format for each specific task.

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